40 CFR Part 131 — Water Quality Standards

PART 131—WATER QUALITY STANDARDS Authority: 33 U.S.C. 1251 et seq. Source: 48 FR 51405, Nov. 8, 1983, unless otherwise noted. Subpart A—General Provisions § 131.1 Scope. This part describes the requirements and procedures for developing, reviewing, revising, and approving water quality standards by the States as authorized by section 303(c) of the Clean Water Act. Additional specific procedures for developing, reviewing, revising, and approving water quality standards for Great Lakes States or Great Lakes Tribes (as defined in 40 CFR 132.2) to conform to section 118 of the Clean Water Act and 40 CFR part 132, are provided in 40 CFR part 132. [60 FR 15386, Mar. 23, 1995] § 131.2 Purpose. A water quality standard defines the water quality goals of a water body, or portion thereof, by designating the use or uses to be made of the water and by setting criteria that protect the designated uses. States adopt water quality standards to protect public health or welfare, enhance the quality of water and serve the purposes of the Clean Water Act (the Act). “Serve the purposes of the Act” (as defined in sections 101(a)(2) and 303(c) of the Act) means that water quality standards should, wherever attainable, provide water quality for the protection and propagation of fish, shellfish and wildlife and for recreation in and on the water and take into consideration their use and value of public water supplies, propagation of fish, shellfish, and wildlife, recreation in and on the water, and agricultural, industrial, and other purposes including navigation. Such standards serve the dual purposes of establishing the water quality goals for a specific water body and serve as the regulatory basis for the establishment of water-quality-based treatment controls and strategies beyond the technology-based levels of treatment required by sections 301(b) and 306 of the Act. [48 FR 51405, Nov. 8, 1983, as amended at 80 FR 51046, Aug. 21, 2015] § 131.3 Definitions. (a) The Act et seq. (b) Criteria (c) Section 304(a) criteria (d) Toxic pollutants (e) Existing uses (f) Designated uses (g) Use attainability analysis (h) Water quality limited segment (i) Water quality standards (j) States (k) Federal Indian Reservation, Indian Reservation, Reservation (l) Indian Tribe Tribe (m) Highest attainable use (n) Practicable (o) A water quality standards variance (p) Pollutant Minimization Program (q) Non-101(a)(2) use (r) Tribal reserved rights, (s) Right holders, [48 FR 51405, Nov. 8, 1983, as amended at 56 FR 64893, Dec. 12, 1991; 59 FR 64344, Dec. 14, 1994; 80 FR 51046, Aug. 21, 2015; 89 FR 35747, May 2, 2024] § 131.4 State authority. (a) States (as defined in § 131.3) are responsible for reviewing, establishing, and revising water quality standards. As recognized by section 510 of the Clean Water Act, States may develop water quality standards more stringent than required by this regulation. Consistent with section 101(g) and 518(a) of the Clean Water Act, water quality standards shall not be construed to supersede or abrogate rights to quantities of water. (b) States (as defined in § 131.3) may issue certifications pursuant to the requirements of Clean Water Act section 401. Revisions adopted by States shall be applicable for use in issuing State certifications consistent with the provisions of § 131.21(c). (c) Where EPA determines that a Tribe is eligible to the same extent as a State for purposes of water quality standards, the Tribe likewise is eligible to the same extent as a State for purposes of certifications conducted under Clean Water Act section 401. [56 FR 64893, Dec. 12, 1991, as amended at 59 FR 64344, Dec. 14, 1994] § 131.5 EPA authority. (a) Under section 303(c) of the Act, EPA is to review and to approve or disapprove State-adopted water quality standards. The review involves a determination of: (1) Whether the State has adopted designated water uses that are consistent with the requirements of the Clean Water Act; (2) Whether the State has adopted criteria that protect the designated water uses based on sound scientific rationale consistent with § 131.11; (3) Whether the State has adopted an antidegradation policy that is consistent with § 131.12, and whether any State adopted antidegradation implementation methods are consistent with § 131.12; (4) Whether any State adopted WQS variance is consistent with § 131.14; (5) Whether any State adopted provision authorizing the use of schedules of compliance for water quality-based effluent limits in NPDES permits is consistent with § 131.15; (6) Whether the State has followed applicable legal procedures for revising or adopting standards; (7) Whether the State standards which do not include the uses specified in section 101(a)(2) of the Act are based upon appropriate technical and scientific data and analyses, and (8) Whether the State submission meets the requirements included in § 131.6 of this part and, for Great Lakes States or Great Lakes Tribes (as defined in 40 CFR 132.2) to conform to section 118 of the Act, the requirements of 40 CFR part 132. (9) Where applicable, whether State adopted water quality standards are consistent with § 131.9. (b) If EPA determines that the State's or Tribe's water quality standards are consistent with the factors listed in paragraphs (a)(1) through (9) of this section, EPA approves the standards. EPA must disapprove the State's or Tribe's water quality standards and promulgate Federal standards under section 303(c)(4), and for Great Lakes States or Great Lakes Tribes under section 118(c)(2)(C) of the Act, if State or Tribal adopted standards are not consistent with the factors listed in paragraphs (a)(1) through (9) of this section. EPA may also promulgate a new or revised standard when necessary to meet the requirements of the Act. (c) Section 401 of the Clean Water Act authorizes EPA to issue certifications pursuant to the requirements of section 401 in any case where a State or interstate agency has no authority for issuing such certifications. [48 FR 51405, Nov. 8, 1983, as amended at 56 FR 64894, Dec. 12, 1991; 60 FR 15387, Mar. 23, 1995; 80 FR 51047, Aug. 21, 2015; 89 FR 35747, May 2, 2024] § 131.6 Minimum requirements for water quality standards submission. The following elements must be included in each State's water quality standards submitted to EPA for review: (a) Use designations consistent with the provisions of sections 101(a)(2) and 303(c)(2) of the Act. (b) Methods used and analyses conducted to support water quality standards revisions. (c) Water quality criteria sufficient to protect the designated uses. (d) An antidegradation policy consistent with § 131.12. (e) Certification by the State Attorney General or other appropriate legal authority within the State that the water quality standards were duly adopted pursuant to State law. (f) General information which will aid the Agency in determining the adequacy of the scientific basis of the standards which do not include the uses specified in section 101(a)(2) of the Act as well as information on general policies applicable to State standards which may affect their application and implementation. (g) Where applicable, information that will aid the Agency in evaluating whether the submission is consistent with § 131.9, including: (1) Any information provided by right holders about relevant Tribal reserved rights and documentation of how that information was considered; and (2) Data and methods used to develop the water quality standards. [48 FR 51405, Nov. 8, 1983, as amended at 89 FR 35747, May 2, 2024] § 131.7 Dispute resolution mechanism. (a) Where disputes between States and Indian Tribes arise as a result of differing water quality standards on common bodies of water, the lead EPA Regional Administrator, as determined based upon OMB circular A-105, shall be responsible for acting in accordance with the provisions of this section. (b) The Regional Administrator shall attempt to resolve such disputes where: (1) The difference in water quality standards results in unreasonable consequences; (2) The dispute is between a State (as defined in § 131.3(j) but exclusive of all Indian Tribes) and a Tribe which EPA has determined is eligible to the same extent as a State for purposes of water quality standards; (3) A reasonable effort to resolve the dispute without EPA involvement has been made; (4) The requested relief is consistent with the provisions of the Clean Water Act and other relevant law; (5) The differing State and Tribal water quality standards have been adopted pursuant to State and Tribal law and approved by EPA; and (6) A valid written request has been submitted by either the Tribe or the State. (c) Either a State or a Tribe may request EPA to resolve any dispute which satisfies the criteria of paragraph (b) of this section. Written requests for EPA involvement should be submitted to the lead Regional Administrator and must include: (1) A concise statement of the unreasonable consequences that are alleged to have arisen because of differing water quality standards; (2) A concise description of the actions which have been taken to resolve the dispute without EPA involvement; (3) A concise indication of the water quality standards provision which has resulted in the alleged unreasonable consequences; (4) Factual data to support the alleged unreasonable consequences; and (5) A statement of the relief sought from the alleged unreasonable consequences. (d) Where, in the Regional Administrator's judgment, EPA involvement is appropriate based on the factors of paragraph (b) of this section, the Regional Administrator shall, within 30 days, notify the parties in writing that he/she is initiating an EPA dispute resolution action and solicit their written response. The Regional Administrator shall also make reasonable efforts to ensure that other interested individuals or groups have notice of this action. Such efforts shall include but not be limited to the following: (1) Written notice to responsible Tribal and State Agencies, and other affected Federal agencies, (2) Notice to the specific individual or entity that is alleging that an unreasonable consequence is resulting from differing standards having been adopted on a common body of water, (3) Public notice in local newspapers, radio, and television, as appropriate, (4) Publication in trade journal newsletters, and (5) Other means as appropriate. (e) If in accordance with applicable State and Tribal law an Indian Tribe and State have entered into an agreement that resolves the dispute or establishes a mechanism for resolving a dispute, EPA shall defer to this agreement where it is consistent with the Clean Water Act and where it has been approved by EPA. (f) EPA dispute resolution actions shall be consistent with one or a combination of the following options: (1) Mediation. (i) Where the State and Tribe agree to participate in the dispute resolution process, mediation with the intent to establish Tribal-State agreements, consistent with Clean Water Act section 518(d), shall normally be pursued as a first effort. (ii) Mediators shall act as neutral facilitators whose function is to encourage communication and negotiation between all parties to the dispute. (iii) Mediators may establish advisory panels, to consist in part of representatives from the affected parties, to study the problem and recommend an appropriate solution. (iv) The procedure and schedule for mediation of individual disputes shall be determined by the mediator in consultation with the parties. (v) If formal public hearings are held in connection with the actions taken under this paragraph, Agency requirements at 40 CFR 25.5 shall be followed. (2) Arbitration. (i) The arbitrator or arbitration panel shall conduct one or more private or public meetings with the parties and actively solicit information pertaining to the effects of differing water quality permit requirements on upstream and downstream dischargers, comparative risks to public health and the environment, economic impacts, present and historical water uses, the quality of the waters subject to such standards, and other factors relevant to the dispute, such as whether proposed water quality criteria are more stringent than necessary to support designated uses, more stringent than natural background water quality or whether designated uses are reasonable given natural background water quality. (ii) Following consideration of relevant factors as defined in paragraph (f)(2)(i) of this section, the arbitrator or arbitration panel shall have the authority and responsibility to provide all parties and the Regional Administrator with a written recommendation for resolution of the dispute. Arbitration panel recommendations shall, in general, be reached by majority vote. However, where the parties agree to binding arbitration, or where required by the Regional Administrator, recommendations of such arbitration panels may be unanimous decisions. Where binding or non-binding arbitration panels cannot reach a unanimous recommendation after a reasonable period of time, the Regional Administrator may direct the panel to issue a non-binding decision by majority vote. (iii) The arbitrator or arbitration panel members may consult with EPA's Office of General Counsel on legal issues, but otherwise shall have no ex parte (iv) The parties are not obligated to abide by the arbitrator's or arbitration panel's recommendation unless they voluntarily entered into a binding agreement to do so. (v) If a party to the dispute believes that the arbitrator or arbitration panel has recommended an action contrary to or inconsistent with the Clean Water Act, the party may appeal the arbitrator's recommendation to the Regional Administrator. The request for appeal must be in writing and must include a description of the statutory basis for altering the arbitrator's recommendation. (vi) The procedure and schedule for arbitration of individual disputes shall be determined by the arbitrator or arbitration panel in consultation with parties. (vii) If formal public hearings are held in connection with the actions taken under this paragraph, Agency requirements at 40 CFR 25.5 shall be followed. (3) Dispute resolution default procedure. (g) Definitions. (1) Dispute Resolution Mechanism (2) Parties [56 FR 64894, Dec. 12, 1991, as amended at 59 FR 64344, Dec. 14, 1994] § 131.8 Requirements for Indian Tribes to administer a water quality standards program. (a) The Regional Administrator, as determined based on OMB Circular A-105, may accept and approve a tribal application for purposes of administering a water quality standards program if the Tribe meets the following criteria: (1) The Indian Tribe is recognized by the Secretary of the Interior and meets the definitions in § 131.3 (k) and (l), (2) The Indian Tribe has a governing body carrying out substantial governmental duties and powers, (3) The water quality standards program to be administered by the Indian Tribe pertains to the management and protection of water resources which are within the borders of the Indian reservation and held by the Indian Tribe, within the borders of the Indian reservation and held by the United States in trust for Indians, within the borders of the Indian reservation and held by a member of the Indian Tribe if such property interest is subject to a trust restriction on alienation, or otherwise within the borders of the Indian reservation, and (4) The Indian Tribe is reasonably expected to be capable, in the Regional Administrator's judgment, of carrying out the functions of an effective water quality standards program in a manner consistent with the terms and purposes of the Act and applicable regulations. (b) Requests by Indian Tribes for administration of a water quality standards program should be submitted to the lead EPA Regional Administrator. The application shall include the following information: (1) A statement that the Tribe is recognized by the Secretary of the Interior. (2) A descriptive statement demonstrating that the Tribal governing body is currently carrying out substantial governmental duties and powers over a defined area. The statement should: (i) Describe the form of the Tribal government; (ii) Describe the types of governmental functions currently performed by the Tribal governing body such as, but not limited to, the exercise of police powers affecting (or relating to) the health, safety, and welfare of the affected population, taxation, and the exercise of the power of eminent domain; and (iii) Identify the source of the Tribal government's authority to carry out the governmental functions currently being performed. (3) A descriptive statement of the Indian Tribe's authority to regulate water quality. The statement should include: (i) A map or legal description of the area over which the Indian Tribe asserts authority to regulate surface water quality; (ii) A statement by the Tribe's legal counsel (or equivalent official) which describes the basis for the Tribes assertion of authority and which may include a copy of documents such as Tribal constitutions, by-laws, charters, executive orders, codes, ordinances, and/or resolutions which support the Tribe's assertion of authority; and (iii) An identification of the surface waters for which the Tribe proposes to establish water quality standards. (4) A narrative statement describing the capability of the Indian Tribe to administer an effective water quality standards program. The narrative statement should include: (i) A description of the Indian Tribe's previous management experience which may include the administration of programs and services authorized by the Indian Self-Determination and Education Assistance Act (25 U.S.C. 450 et seq. et seq. (ii) A list of existing environmental or public health programs administered by the Tribal governing body and copies of related Tribal laws, policies, and regulations; (iii) A description of the entity (or entities) which exercise the executive, legislative, and judicial functions of the Tribal government; (iv) A description of the existing, or proposed, agency of the Indian Tribe which will assume primary responsibility for establishing, reviewing, implementing and revising water quality standards; (v) A description of the technical and administrative capabilities of the staff to administer and manage an effective water quality standards program or a plan which proposes how the Tribe will acquire additional administrative and technical expertise. The plan must address how the Tribe will obtain the funds to acquire the administrative and technical expertise. (5) Additional documentation required by the Regional Administrator which, in the judgment of the Regional Administrator, is necessary to support a Tribal application. (6) Where the Tribe has previously qualified for eligibility or “treatment as a state” under a Clean Water Act or Safe Drinking Water Act program, the Tribe need only provide the required information which has not been submitted in a previous application. (c) Procedure for processing an Indian Tribe's application. (2) Within 30 days after receipt of the Indian Tribe's application the Regional Administrator shall provide appropriate notice. Notice shall: (i) Include information on the substance and basis of the Tribe's assertion of authority to regulate the quality of reservation waters; and (ii) Be provided to all appropriate governmental entities. (3) The Regional Administrator shall provide 30 days for comments to be submitted on the Tribal application. Comments shall be limited to the Tribe's assertion of authority. (4) If a Tribe's asserted authority is subject to a competing or conflicting claim, the Regional Administrator, after due consideration, and in consideration of other comments received, shall determine whether the Tribe has adequately demonstrated that it meets the requirements of § 131.8(a)(3). (5) Where the Regional Administrator determines that a Tribe meets the requirements of this section, he shall promptly provide written notification to the Indian Tribe that the Tribe is authorized to administer the Water Quality Standards program. [56 FR 64895, Dec. 12, 1991, as amended at 59 FR 64344, Dec. 14, 1994] Subpart B—Establishment of Water Quality Standards § 131.9 Protection of Tribal reserved rights. (a) Where a right holder has asserted a Tribal reserved right in writing to the State and EPA for consideration in establishment of water quality standards, to the extent supported by available data and information, the State must: (1) Take into consideration the use and value of their waters for protecting the Tribal reserved right in adopting or revising designated uses pursuant to § 131.10; (2) Take into consideration the anticipated future exercise of the Tribal reserved right unsuppressed by water quality in establishing relevant water quality standards; and (3) Establish water quality criteria, consistent with § 131.11, to protect the Tribal reserved right where the State has adopted designated uses that either expressly incorporate protection of or encompass the right. This requirement includes developing criteria to protect right holders using at least the same risk level (e.g., cancer risk level, hazard quotient, or illness rate) as the State would otherwise use to develop criteria to protect the State's general population, paired with exposure inputs (e.g., fish consumption rate) representative of right holders exercising their reserved right. (b) States and right holders may request EPA assistance with evaluating Tribal reserved rights. EPA will provide such assistance to the extent practicable. In providing assistance to States as they adopt and revise water quality standards consistent with paragraph (a) of this section, EPA will engage with right holders. (c) In reviewing State water quality standards submissions under this section, EPA will initiate the Tribal consultation process with the right holders that have asserted their rights for consideration in establishment of water quality standards, consistent with applicable EPA Tribal consultation policies, in determining whether State water quality standards are consistent with paragraph (a) of this section. [89 FR 35747, May 2, 2024] § 131.10 Designation of uses. (a) Each State must specify appropriate water uses to be achieved and protected. The classification of the waters of the State must take into consideration the use and value of water for public water supplies, protection and propagation of fish, shellfish and wildlife, recreation in and on the water, agricultural, industrial, and other purposes including navigation. If adopting new or revised designated uses other than the uses specified in section 101(a)(2) of the Act, or removing designated uses, States must submit documentation justifying how their consideration of the use and value of water for those uses listed in this paragraph appropriately supports the State's action. A use attainability analysis may be used to satisfy this requirement. In no case shall a State adopt waste transport or waste assimilation as a designated use for any waters of the United States. (b) In designating uses of a water body and the appropriate criteria for those uses, the State shall take into consideration the water quality standards of downstream waters and shall ensure that its water quality standards provide for the attainment and maintenance of the water quality standards of downstream waters. (c) States may adopt sub-categories of a use and set the appropriate criteria to reflect varying needs of such sub-categories of uses, for instance, to differentiate between cold water and warm water fisheries. (d) At a minimum, uses are deemed attainable if they can be achieved by the imposition of effluent limits required under sections 301(b) and 306 of the Act and cost-effective and reasonable best management practices for nonpoint source control. (e) [Reserved] (f) States may adopt seasonal uses as an alternative to reclassifying a water body or segment thereof to uses requiring less stringent water quality criteria. If seasonal uses are adopted, water quality criteria should be adjusted to reflect the seasonal uses, however, such criteria shall not preclude the attainment and maintenance of a more protective use in another season. (g) States may designate a use, or remove a use that is not (1) Naturally occurring pollutant concentrations prevent the attainment of the use; or (2) Natural, ephemeral, intermittent or low flow conditions or water levels prevent the attainment of the use, unless these conditions may be compensated for by the discharge of sufficient volume of effluent discharges without violating State water conservation requirements to enable uses to be met; or (3) Human caused conditions or sources of pollution prevent the attainment of the use and cannot be remedied or would cause more environmental damage to correct than to leave in place; or (4) Dams, diversions or other types of hydrologic modifications preclude the attainment of the use, and it is not feasible to restore the water body to its original condition or to operate such modification in a way that would result in the attainment of the use; or (5) Physical conditions related to the natural features of the water body, such as the lack of a proper substrate, cover, flow, depth, pools, riffles, and the like, unrelated to water quality, preclude attainment of aquatic life protection uses; or (6) Controls more stringent than those required by sections 301(b) and 306 of the Act would result in substantial and widespread economic and social impact. (h) States may not remove designated uses if: (1) They are existing uses, as defined in § 131.3, unless a use requiring more stringent criteria is added; or (2) Such uses will be attained by implementing effluent limits required under sections 301(b) and 306 of the Act and by implementing cost-effective and reasonable best management practices for nonpoint source control. (i) Where existing water quality standards specify designated uses less than those which are presently being attained, the State shall revise its standards to reflect the uses actually being attained. (j) A State must conduct a use attainability analysis as described in § 131.3(g), and paragraph (g) of this section, whenever: (1) The State designates for the first time, or has previously designated for a water body, uses that do not include the uses specified in section 101(a)(2) of the Act; or (2) The State wishes to remove a designated use that is specified in section 101(a)(2) of the Act, to remove a sub-category of such a use, or to designate a sub-category of such a use that requires criteria less stringent than previously applicable. (k) A State is not required to conduct a use attainability analysis whenever: (1) The State designates for the first time, or has previously designated for a water body, uses that include the uses specified in section 101(a)(2) of the Act; or (2) The State designates a sub-category of a use specified in section 101(a)(2) of the Act that requires criteria at least as stringent as previously applicable; or (3) The State wishes to remove or revise a designated use that is a non-101(a)(2) use. In this instance, as required by paragraph (a) of this section, the State must submit documentation justifying how its consideration of the use and value of water for those uses listed in paragraph (a) appropriately supports the State's action, which may be satisfied through a use attainability analysis. [48 FR 51405, Nov. 8, 1983, as amended at 80 FR 51047, Aug. 21, 2015] § 131.11 Criteria. (a) Inclusion of pollutants: (2) Toxic pollutants. (b) Form of criteria: (1) Establish numerical values based on: (i) 304(a) Guidance; or (ii) 304(a) Guidance modified to reflect site-specific conditions; or (iii) Other scientifically defensible methods; (2) Establish narrative criteria or criteria based upon biomonitoring methods where numerical criteria cannot be established or to supplement numerical criteria. [48 FR 51405, Nov. 8, 1983, as amended at 51047, Aug. 21, 2015] § 131.12 Antidegradation policy and implementation methods. (a) The State shall develop and adopt a statewide antidegradation policy. The antidegradation policy shall, at a minimum, be consistent with the following: (1) Existing instream water uses and the level of water quality necessary to protect the existing uses shall be maintained and protected. (2) Where the quality of the waters exceeds levels necessary to support the protection and propagation of fish, shellfish, and wildlife and recreation in and on the water, that quality shall be maintained and protected unless the State finds, after full satisfaction of the intergovernmental coordination and public participation provisions of the State's continuing planning process, that allowing lower water quality is necessary to accommodate important economic or social development in the area in which the waters are located. In allowing such degradation or lower water quality, the State shall assure water quality adequate to protect existing uses fully. Further, the State shall assure that there shall be achieved the highest statutory and regulatory requirements for all new and existing point sources and all cost-effective and reasonable best management practices for nonpoint source control. (i) The State may identify waters for the protections described in paragraph (a)(2) of this section on a parameter-by-parameter basis or on a water body-by-water body basis. Where the State identifies waters for antidegradation protection on a water body-by-water body basis, the State shall provide an opportunity for public involvement in any decisions about whether the protections described in paragraph (a)(2) of this section will be afforded to a water body, and the factors considered when making those decisions. Further, the State shall not exclude a water body from the protections described in paragraph (a)(2) of this section solely because water quality does not exceed levels necessary to support all of the uses specified in section 101(a)(2) of the Act. (ii) Before allowing any lowering of high water quality, pursuant to paragraph (a)(2) of this section, the State shall find, after an analysis of alternatives, that such a lowering is necessary to accommodate important economic or social development in the area in which the waters are located. The analysis of alternatives shall evaluate a range of practicable alternatives that would prevent or lessen the degradation associated with the proposed activity. When the analysis of alternatives identifies one or more practicable alternatives, the State shall only find that a lowering is necessary if one such alternative is selected for implementation. (3) Where high quality waters constitute an outstanding National resource, such as waters of National and State parks and wildlife refuges and waters of exceptional recreational or ecological significance, that water quality shall be maintained and protected. (4) In those cases where potential water quality impairment associated with a thermal discharge is involved, the antidegradation policy and implementing method shall be consistent with section 316 of the Act. (b) The State shall develop methods for implementing the antidegradation policy that are, at a minimum, consistent with the State's policy and with paragraph (a) of this section. The State shall provide an opportunity for public involvement during the development and any subsequent revisions of the implementation methods, and shall make the methods available to the public. [48 FR 51405, Nov. 8, 1983, as amended at 80 FR 51047, Aug. 21, 2015] § 131.13 General policies. States may, at their discretion, include in their State standards, policies generally affecting their application and implementation, such as mixing zones, low flows and variances. Such policies are subject to EPA review and approval. § 131.14 Water quality standards variances. States may adopt WQS variances, as defined in § 131.3(o). Such a WQS variance is subject to the provisions of this section and public participation requirements at § 131.20(b). A WQS variance is a water quality standard subject to EPA review and approval or disapproval. (a) Applicability. (2) Where a State adopts a WQS variance, the State must retain, in its standards, the underlying designated use and criterion addressed by the WQS variance, unless the State adopts and EPA approves a revision to the underlying designated use and criterion consistent with §§ 131.10 and 131.11. All other applicable standards not specifically addressed by the WQS variance remain applicable. (3) A WQS variance, once adopted by the State and approved by EPA, shall be the applicable standard for purposes of the Act under § 131.21(d) through (e), for the following limited purposes. An approved WQS variance applies for the purposes of developing NPDES permit limits and requirements under 301(b)(1)(C), where appropriate, consistent with paragraph (a)(1) of this section. States and other certifying entities may also use an approved WQS variance when issuing certifications under section 401 of the Act. (4) A State may not adopt WQS variances if the designated use and criterion addressed by the WQS variance can be achieved by implementing technology-based effluent limits required under sections 301(b) and 306 of the Act. (b) Requirements for Submission to EPA. (i) Identification of the pollutant(s) or water quality parameter(s), and the water body/waterbody segment(s) to which the WQS variance applies. Discharger(s)-specific WQS variances must also identify the permittee(s) subject to the WQS variance. (ii) The requirements that apply throughout the term of the WQS variance. The requirements shall represent the highest attainable condition of the water body or waterbody segment applicable throughout the term of the WQS variance based on the documentation required in (b)(2) of this section. The requirements shall not result in any lowering of the currently attained ambient water quality, unless a WQS variance is necessary for restoration activities, consistent with paragraph (b)(2)(i)(A)( 2 (A) For discharger(s)-specific WQS variances: ( 1 ( 2 ( 3 (B) For WQS variances applicable to a water body or waterbody segment: ( 1 ( 2 (iii) A statement providing that the requirements of the WQS variance are either the highest attainable condition identified at the time of the adoption of the WQS variance, or the highest attainable condition later identified during any reevaluation consistent with paragraph (b)(1)(v) of this section, whichever is more stringent. (iv) The term of the WQS variance, expressed as an interval of time from the date of EPA approval or a specific date. The term of the WQS variance must only be as long as necessary to achieve the highest attainable condition and consistent with the demonstration provided in paragraph (b)(2) of this section. The State may adopt a subsequent WQS variance consistent with this section. (v) For a WQS variance with a term greater than five years, a specified frequency to reevaluate the highest attainable condition using all existing and readily available information and a provision specifying how the State intends to obtain public input on the reevaluation. Such reevaluations must occur no less frequently than every five years after EPA approval of the WQS variance and the results of such reevaluation must be submitted to EPA within 30 days of completion of the reevaluation. (vi) A provision that the WQS variance will no longer be the applicable water quality standard for purposes of the Act if the State does not conduct a reevaluation consistent with the frequency specified in the WQS variance or the results are not submitted to EPA as required by (b)(1)(v) of this section. (2) The supporting documentation must include: (i) Documentation demonstrating the need for a WQS variance. (A) For a WQS variance to a use specified in section 101(a)(2) of the Act or a sub-category of such a use, the State must demonstrate that attaining the designated use and criterion is not feasible throughout the term of the WQS variance because: ( 1 ( 2 (B) For a WQS variance to a non-101(a)(2) use, the State must submit documentation justifying how its consideration of the use and value of the water for those uses listed in § 131.10(a) appropriately supports the WQS variance and term. A demonstration consistent with paragraph (b)(2)(i)(A) of this section may be used to satisfy this requirement. (ii) Documentation demonstrating that the term of the WQS variance is only as long as necessary to achieve the highest attainable condition. Such documentation must justify the term of the WQS variance by describing the pollutant control activities to achieve the highest attainable condition, including those activities identified through a Pollutant Minimization Program, which serve as milestones for the WQS variance. (iii) In addition to paragraphs (b)(2)(i) and (ii) of this section, for a WQS variance that applies to a water body or waterbody segment: (A) Identification and documentation of any cost-effective and reasonable best management practices for nonpoint source controls related to the pollutant(s) or water quality parameter(s) and water body or waterbody segment(s) specified in the WQS variance that could be implemented to make progress towards attaining the underlying designated use and criterion. A State must provide public notice and comment for any such documentation. (B) Any subsequent WQS variance for a water body or waterbody segment must include documentation of whether and to what extent best management practices for nonpoint source controls were implemented to address the pollutant(s) or water quality parameter(s) subject to the WQS variance and the water quality progress achieved. (c) Implementing WQS variances in NPDES permits. [80 FR 51048, Aug. 21, 2015] § 131.15 Authorizing the use of schedules of compliance for water quality-based effluent limits in NPDES permits. If a State intends to authorize the use of schedules of compliance for water quality-based effluent limits in NPDES permits, the State must adopt a permit compliance schedule authorizing provision. Such authorizing provision is a water quality standard subject to EPA review and approval under section 303 of the Act and must be consistent with sections 502(17) and 301(b)(1)(C) of the Act. [80 FR 51049, Aug. 21, 2015] Subpart C—Procedures for Review and Revision of Water Quality Standards § 131.20 State review and revision of water quality standards. (a) State review. (b) Public participation. (c) Submittal to EPA. [48 FR 51405, Nov. 8, 1983, as amended at 80 FR 51049, Aug. 21, 2015; 89 FR 35748, May 2, 2024] § 131.21 EPA review and approval of water quality standards. (a) After the State submits its officially adopted revisions, the Regional Administrator shall either: (1) Notify the State within 60 days that the revisions are approved, or (2) Notify the State within 90 days that the revisions are disapproved. Such notification of disapproval shall specify the changes needed to assure compliance with the requirements of the Act and this regulation, and shall explain why the State standard is not in compliance with such requirements. Any new or revised State standard must be accompanied by some type of supporting analysis. (b) The Regional Administrator's approval or disapproval of a State water quality standard shall be based on the requirements of the Act as described in §§ 131.5 and 131.6, and, with respect to Great Lakes States or Tribes (as defined in 40 CFR 132.2), 40 CFR part 132. (c) How do I determine which water quality standards are applicable for purposes of the Act? If— Then— Unless or until— In which case— (1) A State or authorized Tribe has adopted a water quality standard that is effective under State or Tribal law and has been submitted to EPA before May 30, 2000 . . . . . the State or Tribe's water quality standard is the applicable water quality standard for purposes of the Act . . . . . EPA has promulgated a more stringent water quality standard for the State or Tribe that is in effect . . . . . the EPA-promulgated water quality standard is the applicable water quality standard for purposes of the Act until EPA withdraws the Federal water quality standard. (2) A State or authorized Tribe adopts a water quality standard that goes into effect under State or Tribal law on or after . . . once EPA approves that water quality standard, it becomes the applicable water quality standard for purposes of the Act . . . . . EPA has promulgated a more stringent water quality standard for the State or Tribe that is in effect . . . . . the EPA promulgated water quality standard is the applicable water quality standard for purposes of the Act until EPA withdraws the Federal water quality standard. (d) When do I use the applicable water quality standards identified in paragraph (c) above? (e) For how long does an applicable water quality standard for purposes of the Act remain the applicable water quality standard for purposes of the Act? (f) How can I find out what the applicable standards are for purposes of the Act? [48 FR 51405, Nov. 8, 1983, as amended at 60 FR 15387, Mar. 23, 1995; 65 FR 24653, Apr. 27, 2000] § 131.22 EPA promulgation of water quality standards. (a) If the State does not adopt the changes specified by the Regional Administrator within 90 days after notification of the Regional Administrator's disapproval, the Administrator shall promptly propose and promulgate such standard. (b) The Administrator may also propose and promulgate a regulation, applicable to one or more navigable waters, setting forth a new or revised standard upon determining such a standard is necessary to meet the requirements of the Act. To constitute an Administrator's determination that a new or revised standard is necessary to meet the requirements of the Act, such determination must: (1) Be signed by the Administrator or his or her duly authorized delegate, and (2) Contain a statement that the document constitutes an Administrator's determination under section 303(c)(4)(B) of the Act. (c) In promulgating water quality standards, the Administrator is subject to the same policies, procedures, analyses, and public participation requirements established for States in these regulations. [48 FR 51405, Nov. 8, 1983, as amended at 80 FR 51049, Aug. 21, 2015 Subpart D—Federally Promulgated Water Quality Standards § 131.31 Arizona. (a) [Reserved] (b) The following waters have, in addition to the uses designated by the State, the designated use of fish consumption as defined in R18-11-101 (which is available from the Arizona Department of Environmental Quality, Water Quality Division, 3033 North Central Ave., Phoenix, AZ 85012): COLORADO MAIN STEM RIVER BASIN: Hualapai Wash MIDDLE GILA RIVER BASIN: Agua Fria River (Camelback Road to Avondale WWTP) Galena Gulch Gila River (Felix Road to the Salt River) Queen Creek (Headwaters to the Superior WWTP) Queen Creek (Below Potts Canyon) SAN PEDRO RIVER BASIN: Copper Creek SANTA CRUZ RIVER BASIN: Agua Caliente Wash Nogales Wash Sonoita Creek (Above the town of Patagonia) Tanque Verde Creek Tinaja Wash Davidson Canyon UPPER GILA RIVER BASIN Chase Creek (c) To implement the requirements of R18-11-108.A.5 with respect to effects of mercury on wildlife, EPA (or the State with the approval of EPA) shall implement a monitoring program to assess attainment of the water quality standard. (Sec. 303, Federal Water Pollution Control Act, as amended, 33 U.S.C. 1313, 86 Stat. 816 et seq., et seq.) [41 FR 25000, June 22, 1976; 41 FR 48737, Nov. 5, 1976. Redesignated and amended at 42 FR 56740, Oct. 28, 1977. Further redesignated and amended at 48 FR 51408, Nov. 8, 1983; 61 FR 20693, May 7, 1996; 68 FR 62744, Nov. 6, 2003] § 131.32 [Reserved] § 131.33 Idaho. (a) Temperature criteria for bull trout. (2) The following waters are protected for bull trout spawning and rearing: (i) BOISE-MORE BASIN: Devils Creek, East Fork Sheep Creek, Sheep Creek. (ii) BROWNLEE RESERVOIR BASIN: Crooked River, Indian Creek. (iii) CLEARWATER BASIN: Big Canyon Creek, Cougar Creek, Feather Creek, Laguna Creek, Lolo Creek, Orofino Creek, Talapus Creek, West Fork Potlatch River. (iv) COEUR D'ALENE LAKE BASIN: Cougar Creek, Fernan Creek, Kid Creek, Mica Creek, South Fork Mica Creek, Squaw Creek, Turner Creek. (v) HELLS CANYON BASIN: Dry Creek, East Fork Sheep Creek, Getta Creek, Granite Creek, Kurry Creek, Little Granite Creek, Sheep Creek. (vi) LEMHI BASIN: Adams Creek, Alder Creek, Basin Creek, Bear Valley Creek, Big Eightmile Creek, Big Springs Creek, Big Timber Creek, Bray Creek, Bull Creek, Cabin Creek, Canyon Creek, Carol Creek, Chamberlain Creek, Clear Creek, Climb Creek, Cooper Creek, Dairy Creek, Deer Creek, Deer Park Creek, East Fork Hayden Creek, Eighteenmile Creek, Falls Creek, Ferry Creek, Ford Creek, Geertson Creek, Grove Creek, Hawley Creek, Hayden Creek, Kadletz Creek, Kenney Creek, Kirtley Creek, Lake Creek, Lee Creek, Lemhi River (above Big Eightmile Creek), Little Eightmile Creek, Little Mill Creek, Little Timber Creek, Middle Fork Little Timber Creek, Milk Creek, Mill Creek, Mogg Creek, North Fork Kirtley Creek, North Fork Little Timber Creek, Paradise Creek, Patterson Creek, Payne Creek, Poison Creek, Prospect Creek, Rocky Creek, Short Creek, Squaw Creek, Squirrel Creek, Tobias Creek, Trail Creek, West Fork Hayden Creek, Wright Creek. (vii) LITTLE LOST BASIN: Badger Creek, Barney Creek, Bear Canyon, Bear Creek, Bell Mountain Creek, Big Creek, Bird Canyon, Black Creek, Buck Canyon, Bull Creek, Cedar Run Creek, Chicken Creek, Coal Creek, Corral Creek, Deep Creek, Dry Creek, Dry Creek Canal, Firbox Creek, Garfield Creek, Hawley Canyon, Hawley Creek, Horse Creek, Horse Lake Creek, Iron Creek, Jackson Creek, Little Lost River (above Badger Creek), Mahogany Creek, Main Fork Sawmill Creek, Massacre Creek, Meadow Creek, Mill Creek, Moffett Creek, Moonshine Creek, Quigley Creek, Red Rock Creek, Sands Creek, Sawmill Creek, Slide Creek, Smithie Fork, Squaw Creek, Summerhouse Canyon, Summit Creek, Timber Creek, Warm Creek, Wet Creek, Williams Creek. (viii) LITTLE SALMON BASIN: Bascum Canyon, Boulder Creek, Brown Creek, Campbell Ditch, Castle Creek, Copper Creek, Granite Fork Lake Fork Rapid River, Hard Creek, Hazard Creek, Lake Fork Rapid River, Little Salmon River (above Hazard Creek), Paradise Creek, Pony Creek, Rapid River, Squirrel Creek, Trail Creek, West Fork Rapid River. (ix) LOCHSA BASIN: Apgar Creek, Badger Creek, Bald Mountain Creek, Beaver Creek, Big Flat Creek, Big Stew Creek, Boulder Creek, Brushy Fork, Cabin Creek, Castle Creek, Chain Creek, Cliff Creek, Coolwater Creek, Cooperation Creek, Crab Creek, Crooked Fork Lochsa River, Dan Creek, Deadman Creek, Doe Creek, Dutch Creek, Eagle Creek, East Fork Papoose Creek, East Fork Split Creek, East Fork Squaw Creek, Eel Creek, Fern Creek, Fire Creek, Fish Creek, Fish Lake Creek, Fox Creek, Gass Creek, Gold Creek, Ham Creek, Handy Creek, Hard Creek, Haskell Creek, Heather Creek, Hellgate Creek, Holly Creek, Hopeful Creek, Hungery Creek, Indian Grave Creek, Jay Creek, Kerr Creek, Kube Creek, Lochsa River, Lone Knob Creek, Lottie Creek, Macaroni Creek, Maud Creek, Middle Fork Clearwater River, No-see-um Creek, North Fork Spruce Creek, North Fork Storm Creek, Nut Creek, Otter Slide Creek, Pack Creek, Papoose Creek, Parachute Creek, Pass Creek, Pedro Creek, Pell Creek, Pete King Creek, Placer Creek, Polar Creek, Postoffice Creek, Queen Creek, Robin Creek, Rock Creek, Rye Patch Creek, Sardine Creek, Shoot Creek, Shotgun Creek, Skookum Creek, Snowshoe Creek, South Fork Spruce Creek, South Fork Storm Creek, Split Creek, Sponge Creek, Spring Creek, Spruce Creek, Squaw Creek, Storm Creek, Tick Creek, Tomcat Creek, Tumble Creek, Twin Creek, Wag Creek, Walde Creek, Walton Creek, Warm Springs Creek, Weir Creek, Wendover Creek, West Fork Boulder Creek, West Fork Papoose Creek, West Fork Squaw Creek, West Fork Wendover Creek, White Sands Creek, Willow Creek. (x) LOWER CLARK FORK BASIN: Cascade Creek, East Fork, East Fork Creek, East Forkast Fork Creek, Gold Creek, Johnson Creek, Lightning Creek, Mosquito Creek, Porcupine Creek, Rattle Creek, Spring Creek, Twin Creek, Wellington Creek. (xi) LOWER KOOTENAI BASIN: Ball Creek, Boundary Creek, Brush Creek, Cabin Creek, Caribou Creek, Cascade Creek, Cooks Creek, Cow Creek, Curley Creek, Deep Creek, Grass Creek, Jim Creek, Lime Creek, Long Canyon Creek, Mack Creek, Mission Creek, Myrtle Creek, Peak Creek, Snow Creek, Trout Creek. (xii) LOWER MIDDLE FORK SALMON BASIN: Acorn Creek, Alpine Creek, Anvil Creek, Arrastra Creek, Bar Creek, Beagle Creek, Beaver Creek, Belvidere Creek, Big Creek, Birdseye Creek, Boulder Creek, Brush Creek, Buck Creek, Bull Creek, Cabin Creek, Camas Creek, Canyon Creek, Castle Creek, Clark Creek, Coin Creek, Corner Creek, Coxey Creek, Crooked Creek, Doe Creek, Duck Creek, East Fork Holy Terror Creek, Fawn Creek, Flume Creek, Fly Creek, Forge Creek, Furnace Creek, Garden Creek, Government Creek, Grouse Creek, Hammer Creek, Hand Creek, Holy Terror Creek, J Fell Creek, Jacobs Ladder Creek, Lewis Creek, Liberty Creek, Lick Creek, Lime Creek, Little Jacket Creek, Little Marble Creek, Little White Goat Creek, Little Woodtick Creek, Logan Creek, Lookout Creek, Loon Creek, Martindale Creek, Meadow Creek, Middle Fork Smith Creek, Monumental Creek, Moore Creek, Mulligan Creek, North Fork Smith Creek, Norton Creek, Placer Creek, Pole Creek, Rams Creek, Range Creek, Routson Creek, Rush Creek, Sawlog Creek, Sheep Creek, Sheldon Creek, Shellrock Creek, Ship Island Creek, Shovel Creek, Silver Creek, Smith Creek, Snowslide Creek, Soldier Creek, South Fork Camas Creek, South Fork Chamberlain Creek, South Fork Holy Terror Creek, South Fork Norton Creek, South Fork Rush Creek, South Fork Sheep Creek, Spider Creek, Spletts Creek, Telephone Creek, Trail Creek, Two Point Creek, West Fork Beaver Creek, West Fork Camas Creek, West Fork Monumental Creek, West Fork Rush Creek, White Goat Creek, Wilson Creek. (xiii) LOWER NORTH FORK CLEARWATER BASIN: Adair Creek, Badger Creek, Bathtub Creek, Beaver Creek, Black Creek, Brush Creek, Buck Creek, Butte Creek, Canyon Creek, Caribou Creek, Crimper Creek, Dip Creek, Dog Creek, Elmer Creek, Falls Creek, Fern Creek, Goat Creek, Isabella Creek, John Creek, Jug Creek, Jungle Creek, Lightning Creek, Little Lost Lake Creek, Little North Fork Clearwater River, Lost Lake Creek, Lund Creek, Montana Creek, Mowitch Creek, Papoose Creek, Pitchfork Creek, Rocky Run, Rutledge Creek, Spotted Louis Creek, Triple Creek, Twin Creek, West Fork Montana Creek, Willow Creek. (xiv) LOWER SALMON BASIN: Bear Gulch, Berg Creek, East Fork John Day Creek, Elkhorn Creek, Fiddle Creek, French Creek, Hurley Creek, John Day Creek, Kelly Creek, Klip Creek, Lake Creek, Little Slate Creek, Little Van Buren Creek, No Business Creek, North Creek, North Fork Slate Creek, North Fork White Bird Creek, Partridge Creek, Slate Creek, Slide Creek, South Fork John Day Creek, South Fork White Bird Creek, Warm Springs Creek. (xv) LOWER SELWAY BASIN: Anderson Creek, Bailey Creek, Browns Spring Creek, Buck Lake Creek, Butte Creek, Butter Creek, Cabin Creek, Cedar Creek, Chain Creek, Chute Creek, Dent Creek, Disgrace Creek, Double Creek, East Fork Meadow Creek, East Fork Moose Creek, Elbow Creek, Fivemile Creek, Fourmile Creek, Gate Creek, Gedney Creek, Goddard Creek, Horse Creek, Indian Hill Creek, Little Boulder Creek, Little Schwar Creek, Matteson Creek, Meadow Creek, Monument Creek, Moose Creek, Moss Creek, Newsome Creek, North Fork Moose Creek, Rhoda Creek, Saddle Creek, Schwar Creek, Shake Creek, Spook Creek, Spur Creek, Tamarack Creek, West Fork Anderson Creek, West Fork Gedney Creek, West Moose Creek, Wounded Doe Creek. (xvi) MIDDLE FORK CLEARWATER BASIN: Baldy Creek, Big Cedar Creek, Browns Spring Creek, Clear Creek, Middle Fork Clear Creek, Pine Knob Creek, South Fork Clear Creek. (xvii) MIDDLE FORK PAYETTE BASIN: Bull Creek, Middle Fork Payette River (above Fool Creek), Oxtail Creek, Silver Creek, Sixteen-to-one Creek. (xviii) MIDDLE SALMON-CHAMBERLAIN BASIN: Arrow Creek, Bargamin Creek, Bat Creek, Bay Creek, Bear Creek, Bend Creek, Big Elkhorn Creek, Big Harrington Creek, Big Mallard Creek, Big Squaw Creek, Bleak Creek, Bronco Creek, Broomtail Creek, Brown Creek, Cayuse Creek, Center Creek, Chamberlain Creek, Cliff Creek, Colt Creek, Corn Creek, Crooked Creek, Deer Creek, Dennis Creek, Disappointment Creek, Dismal Creek, Dog Creek, East Fork Fall Creek, East Fork Horse Creek, East Fork Noble Creek, Fall Creek, Filly Creek, Fish Creek, Flossie Creek, Game Creek, Gap Creek, Ginger Creek, Green Creek, Grouse Creek, Guard Creek, Hamilton Creek, Horse Creek, Hot Springs Creek, Hotzel Creek, Hungry Creek, Iodine Creek, Jack Creek, Jersey Creek, Kitchen Creek, Lake Creek, Little Horse Creek, Little Lodgepole Creek, Little Mallard Creek, Lodgepole Creek, Mayflower Creek, McCalla Creek, Meadow Creek, Moose Creek, Moose Jaw Creek, Mule Creek, Mustang Creek, No Name Creek, Owl Creek, Poet Creek, Pole Creek, Porcupine Creek, Prospector Creek, Pup Creek, Queen Creek, Rainey Creek, Ranch Creek, Rattlesnake Creek, Red Top Creek, Reynolds Creek, Rim Creek, Ring Creek, Rock Creek, Root Creek, Runaway Creek, Sabe Creek, Saddle Creek, Salt Creek, Schissler Creek, Sheep Creek, Short Creek, Shovel Creek, Skull Creek, Slaughter Creek, Slide Creek, South Fork Cottonwood Creek, South Fork Chamberlain Creek, South Fork Kitchen Creek, South Fork Salmon River, Spread Creek, Spring Creek, Starvation Creek, Steamboat Creek, Steep Creek, Stud Creek, Warren Creek, Webfoot Creek, West Fork Chamberlain Creek, West Fork Rattlesnake Creek, West Horse Creek, Whimstick Creek, Wind River, Woods Fork Horse Creek. (xix) MIDDLE SALMON-PANTHER BASIN: Allen Creek, Arnett Creek, Beaver Creek, Big Deer Creek, Blackbird Creek, Boulder Creek, Cabin Creek, Camp Creek, Carmen Creek, Clear Creek, Colson Creek, Copper Creek, Corral Creek, Cougar Creek, Cow Creek, Deadhorse Creek, Deep Creek, East Boulder Creek, Elkhorn Creek, Fawn Creek, Fourth Of July Creek, Freeman Creek, Homet Creek, Hughes Creek, Hull Creek, Indian Creek, Iron Creek, Jackass Creek, Jefferson Creek, Jesse Creek, Lake Creek, Little Deep Creek, Little Hat Creek, Little Sheep Creek, McConn Creek, McKim Creek, Mink Creek, Moccasin Creek, Moose Creek, Moyer Creek, Musgrove Creek, Napias Creek, North Fork Hughes Creek, North Fork Iron Creek, North Fork Salmon River, North Fork Williams Creek, Opal Creek, Otter Creek, Owl Creek, Panther Creek, Park Creek, Phelan Creek, Pine Creek, Pony Creek, Porphyry Creek, Pruvan Creek, Rabbit Creek, Rancherio Creek, Rapps Creek, Salt Creek, Salzer Creek, Saw Pit Creek, Sharkey Creek, Sheep Creek, South Fork Cabin Creek, South Fork Iron Creek, South Fork Moyer Creek, South Fork Phelan Creek, South Fork Sheep Creek, South Fork Williams Creek, Spring Creek, Squaw Creek, Trail Creek, Twelvemile Creek, Twin Creek, Weasel Creek, West Fork Blackbird Creek, West Fork Iron Creek, Williams Creek, Woodtick Creek. (xx) MOYIE BASIN: Brass Creek, Bussard Creek, Copper Creek, Deer Creek, Faro Creek, Keno Creek, Kreist Creek, Line Creek, McDougal Creek, Mill Creek, Moyie River (above Skin Creek), Placer Creek, Rutledge Creek, Skin Creek, Spruce Creek, West Branch Deer Creek. (xxi) NORTH AND MIDDLE FORK BOISE BASIN: Abby Creek, Arrastra Creek, Bald Mountain Creek, Ballentyne Creek, Banner Creek, Bayhouse Creek, Bear Creek, Bear River, Big Gulch, Big Silver Creek, Billy Creek, Blackwarrior Creek, Bow Creek, Browns Creek, Buck Creek, Cabin Creek, Cahhah Creek, Camp Gulch, China Fork, Coma Creek, Corbus Creek, Cow Creek, Crooked River, Cub Creek, Decker Creek, Dutch Creek, Dutch Frank Creek, East Fork Roaring River, East Fork Swanholm Creek, East Fork Yuba River, Flint Creek, Flytrip Creek, Gotch Creek, Graham Creek, Granite Creek, Grays Creek, Greylock Creek, Grouse Creek, Hot Creek, Hungarian Creek, Joe Daley Creek, Johnson Creek, Kid Creek, King Creek, La Mayne Creek, Leggit Creek, Lightning Creek, Little Queens River, Little Silver Creek, Louise Creek, Lynx Creek, Mattingly Creek, McKay Creek, McLeod Creek, McPhearson Creek, Middle Fork Boise River (above Roaring River), Middle Fork Corbus Creek, Middle Fork Roaring River, Mill Creek, Misfire Creek, Montezuma Creek, North Fork Boise River (above Bear River), Phifer Creek, Pikes Fork, Quartz Gulch, Queens River, Rabbit Creek, Right Creek, Roaring River, Robin Creek, Rock Creek, Rockey Creek, Sawmill Creek, Scenic Creek, Scotch Creek, Scott Creek, Shorip Creek, Smith Creek, Snow Creek, Snowslide Creek, South Fork Corbus Creek, South Fork Cub Creek, Spout Creek, Steamboat Creek, Steel Creek, Steppe Creek, Swanholm Creek, Timpa Creek, Trail Creek, Trapper Creek, Tripod Creek, West Fork Creek, West Warrior Creek, Willow Creek, Yuba River. (xxii) NORTH FORK PAYETTE BASIN: Gold Fork River, North Fork Gold Fork River, Pearsol Creek. (xxiii) AHSIMEROI BASIN: Baby Creek, Bear Creek, Big Creek, Big Gulch, Burnt Creek, Christian Gulch, Dead Cat Canyon, Ditch Creek, Donkey Creek, Doublespring Creek, Dry Canyon, Dry Gulch, East Fork Burnt Creek, East Fork Morgan Creek, East Fork Pahsimeroi River, East Fork Patterson Creek, Elkhorn Creek, Falls Creek, Goldberg Creek, Hillside Creek, Inyo Creek, Long Creek, Mahogany Creek, Mill Creek, Morgan Creek, Morse Creek, Mulkey Gulch, North Fork Big Creek, North Fork Morgan Creek, Pahsimeroi River (above Big Creek), Patterson Creek, Rock Spring Canyon, Short Creek, Snowslide Creek, South Fork Big Creek, Spring Gulch, Squaw Creek, Stinking Creek, Tater Creek, West Fork Burnt Creek, West Fork North Fork Big Creek. (xxiv) PAYETTE BASIN: Squaw Creek, Third Fork Squaw Creek. (xxv) PEND OREILLE LAKE BASIN: Branch North Gold Creek, Cheer Creek, Chloride Gulch, Dry Gulch, Dyree Creek, Flume Creek, Gold Creek, Granite Creek, Grouse Creek, Kick Bush Gulch, North Fork Grouse Creek, North Gold Creek, Plank Creek, Rapid Lightning Creek, South Fork Grouse Creek, Strong Creek, Thor Creek, Trestle Creek, West Branch Pack River, West Gold Creek, Wylie Creek, Zuni Creek. (xxvi) PRIEST BASIN: Abandon Creek, Athol Creek, Bath Creek, Bear Creek, Bench Creek, Blacktail Creek, Bog Creek, Boulder Creek, Bugle Creek, Canyon Creek, Caribou Creek, Cedar Creek, Chicopee Creek, Deadman Creek, East Fork Trapper Creek, East River, Fedar Creek, Floss Creek, Gold Creek, Granite Creek, Horton Creek, Hughes Fork, Indian Creek, Jackson Creek, Jost Creek, Kalispell Creek, Kent Creek, Keokee Creek, Lime Creek, Lion Creek, Lost Creek, Lucky Creek, Malcom Creek, Middle Fork East River, Muskegon Creek, North Fork Granite Creek, North Fork Indian Creek, Packer Creek, Rock Creek, Ruby Creek, South Fork Granite Creek, South Fork Indian Creek, South Fork Lion Creek, Squaw Creek, Tango Creek, Tarlac Creek, The Thorofare, Trapper Creek, Two Mouth Creek, Uleda Creek, Priest R. (above Priest Lake), Zero Creek. (xxvii) SOUTH FORK BOISE BASIN: Badger Creek, Bear Creek, Bear Gulch, Big Smoky Creek, Big Water Gulch, Boardman Creek, Burnt Log Creek, Cayuse Creek, Corral Creek, Cow Creek, Edna Creek, Elk Creek, Emma Creek, Feather River, Fern Gulch, Grape Creek, Gunsight Creek, Haypress Creek, Heather Creek, Helen Creek, Johnson Creek, Lincoln Creek, Little Cayuse Creek, Little Rattlesnake Creek, Little Skeleton Creek, Little Smoky Creek, Loggy Creek, Mule Creek, North Fork Ross Fork, Pinto Creek, Rattlesnake Creek, Ross Fork, Russel Gulch, Salt Creek, Shake Creek, Skeleton Creek, Slater Creek, Smokey Dome Canyon, South Fork Ross Fork, Three Forks Creek, Tipton Creek, Vienna Creek, Weeks Gulch, West Fork Big Smoky Creek, West Fork Salt Creek, West Fork Skeleton Creek, Willow Creek. (xxviii) SOUTH FORK CLEARWATER BASIN: American River, Baker Gulch, Baldy Creek, Bear Creek, Beaver Creek, Big Canyon Creek, Big Elk Creek, Blanco Creek, Boundary Creek, Box Sing Creek, Boyer Creek, Cartwright Creek, Cole Creek, Crooked River, Dawson Creek, Deer Creek, Ditch Creek, East Fork American River, East Fork Crooked River, Elk Creek, Fivemile Creek, Flint Creek, Fourmile Creek, Fox Creek, French Gulch, Galena Creek, Gospel Creek, Hagen Creek, Hays Creek, Johns Creek, Jungle Creek, Kirks Fork American River, Little Elk Creek, Little Moose Creek, Little Siegel Creek, Loon Creek, Mackey Creek, Meadow Creek, Melton Creek, Middle Fork Red River, Mill Creek, Monroe Creek, Moores Creek, Moores Lake Creek, Moose Butte Creek, Morgan Creek, Mule Creek, Newsome Creek, Nuggett Creek, Otterson Creek, Pat Brennan Creek, Pilot Creek, Quartz Creek, Queen Creek, Rabbit Creek, Rainbow Gulch, Red River, Relief Creek, Ryan Creek, Sally Ann Creek, Sawmill Creek, Schooner Creek, Schwartz Creek, Sharmon Creek, Siegel Creek, Silver Creek, Sixmile Creek, Sixtysix Creek, Snoose Creek, Sourdough Creek, South Fork Red River, Square Mountain Creek, Swale Creek, Swift Creek, Taylor Creek, Tenmile Creek, Trail Creek, Trapper Creek, Trout Creek, Twentymile Creek, Twin Lakes Creek, Umatilla Creek, West Fork Big Elk Creek, West Fork Crooked River, West Fork Gospel Creek, West Fork Newsome Creek, West Fork Red River, West Fork Twentymile Creek, Whiskey Creek, Whitaker Creek, Williams Creek. (xxix) SOUTH FORK PAYETTE BASIN: Archie Creek, Ash Creek, Baron Creek, Basin Creek, Bear Creek, Beaver Creek, Big Spruce Creek, Bitter Creek, Blacks Creek, Blue Jay Creek, Burn Creek, Bush Creek, Camp Creek, Canyon Creek, Casner Creek, Cat Creek, Chapman Creek, Charters Creek, Clear Creek, Coski Creek, Cup Creek, Dead Man Creek, Deadwood River, Deer Creek, East Fork Deadwood Creek, East Fork Warm Springs Creek, Eby Creek, Elkhorn Creek, Emma Creek, Fall Creek, Fence Creek, Fern Creek, Fivemile Creek, Fox Creek, Garney Creek, Gates Creek, Goat Creek, Grandjem Creek, Grouse Creek, Habit Creek, Helende Creek, Horse Creek, Huckleberry Creek, Jackson Creek, Kettle Creek, Kirkham Creek, Lake Creek, Lick Creek, Little Tenmile Creek, Logging Gulch, Long Creek, MacDonald Creek, Meadow Creek, Middle Fork Warm Springs Creek, Miller Creek, Monument Creek, Moulding Creek, Ninemile Creek, No Man Creek, No Name Creek, North Fork Baron Creek, North Fork Canyon Creek, North Fork Deer Creek, North Fork Whitehawk Creek, O'Keefe Creek, Packsaddle Creek, Park Creek, Pass Creek, Pinchot Creek, Pine Creek, Pitchfork Creek, Pole Creek, Richards Creek, Road Fork Rock Creek, Rock Creek, Rough Creek, Scott Creek, Silver Creek, Sixmile Creek, Smith Creek, Smokey Creek, South Fork Beaver Creek, South Fork Canyon Creek, South Fork Clear Creek, South Fork Payette River (above Rock Creek), South Fork Scott Creek, South Fork Warm Spring Creek, Spring Creek, Steep Creek, Stratton Creek, Topnotch Creek, Trail Creek, Wapiti Creek, Warm Spring Creek, Warm Springs Creek, Whangdoodle Creek, Whitehawk Creek, Wild Buck Creek, Wills Gulch, Wilson Creek, Wolf Creek. (xxx) SOUTH FORK SALMON BASIN: Alez Creek, Back Creek, Bear Creek, Bishop Creek, Blackmare Creek, Blue Lake Creek, Buck Creek, Buckhorn Bar Creek, Buckhorn Creek, Burgdorf Creek, Burntlog Creek, Cabin Creek, Calf Creek, Camp Creek, Cane Creek, Caton Creek, Cinnabar Creek, Cliff Creek, Cly Creek, Cougar Creek, Cow Creek, Cox Creek, Curtis Creek, Deep Creek, Dollar Creek, Dutch Creek, East Fork South Fork Salmon River, East Fork Zena Creek, Elk Creek, Enos Creek, Falls Creek, Fernan Creek, Fiddle Creek, Fitsum Creek, Flat Creek, Fourmile Creek, Goat Creek, Grimmet Creek, Grouse Creek, Halfway Creek, Hanson Creek, Hays Creek, Holdover Creek, Hum Creek, Indian Creek, Jeanette Creek, Johnson Creek, Josephine Creek, Jungle Creek, Knee Creek, Krassel Creek, Lake Creek, Landmark Creek, Lick Creek, Little Buckhorn Creek, Little Indian Creek, Lodgepole Creek, Loon Creek, Maverick Creek, Meadow Creek, Middle Fork Elk Creek, Missouri Creek, Moose Creek, Mormon Creek, Nasty Creek, Nethker Creek, Nick Creek, No Mans Creek, North Fork Bear Creek, North Fork Buckhorn Creek, North Fork Camp Creek, North Fork Dollar Creek, North Fork Fitsum Creek, North Fork Lake Fork, North Fork Lick Creek, North Fork Riordan Creek, North Fork Six-bit Creek, Oompaul Creek, Paradise Creek, Park Creek, Peanut Creek, Pepper Creek, Phoebe Creek, Piah Creek, Pid Creek, Pilot Creek, Pony Creek, Porcupine Creek, Porphyry Creek, Prince Creek, Profile Creek, Quartz Creek, Reeves Creek, Rice Creek, Riordan Creek, Roaring Creek, Ruby Creek, Rustican Creek, Ryan Creek, Salt Creek, Sand Creek, Secesh River, Sheep Creek, Silver Creek, Sister Creek, Six-Bit Creek, South Fork Bear Creek, South Fork Blackmare Creek, South Fork Buckhorn Creek, South Fork Cougar Creek, South Fork Elk Creek, South Fork Fitsum Creek, South Fork Fourmile Creek, South Fork Salmon River, South Fork Threemile Creek, Split Creek, Steep Creek, Sugar Creek, Summit Creek, Tamarack Creek, Teepee Creek, Threemile Creek, Trail Creek, Trapper Creek, Trout Creek, Tsum Creek, Two-bit Creek, Tyndall Creek, Vein Creek, Victor Creek, Wardenhoff Creek, Warm Lake Creek, Warm Spring Creek, West Fork Buckhorn Creek, West Fork Elk Creek, West Fork Enos Creek, West Fork Zena Creek, Whangdoodle Creek, Willow Basket Creek, Willow Creek, Zena Creek. (xxxi) ST. JOE R. BASIN: Bad Bear Creek, Bean Creek, Bear Creek, Beaver Creek, Bedrock Creek, Berge Creek, Bird Creek, Blue Grouse Creek, Boulder Creek, Broadaxe Creek, Bruin Creek, California Creek, Cherry Creek, Clear Creek, Color Creek, Copper Creek, Dolly Creek, Dump Creek, Eagle Creek, East Fork Bluff Creek, East Fork Gold Creek, Emerald Creek, Fishhook Creek, Float Creek, Fly Creek, Fuzzy Creek, Gold Creek, Heller Creek, Indian Creek, Kelley Creek, Malin Creek, Marble Creek, Medicine Creek, Mica Creek, Mill Creek, Mosquito Creek, North Fork Bean Creek, North Fork Saint Joe River, North Fork Simmons Creek, Nugget Creek, Packsaddle Creek, Periwinkle Creek, Prospector Creek, Quartz Creek, Red Cross Creek, Red Ives Creek, Ruby Creek, Saint Joe River (above Siwash Creek), Setzer Creek, Sherlock Creek, Simmons Creek, Siwash Creek, Skookum Creek, Thomas Creek, Thorn Creek, Three Lakes Creek, Timber Creek, Tinear Creek, Trout Creek, Tumbledown Creek, Wahoo Creek, Washout Creek, Wilson Creek, Yankee Bar Creek. (xxxii) UPPER COEUR D'ALENE BASIN: Brown Creek, Falls Creek, Graham Creek. (xxxiii) UPPER KOOTENAI BASIN: Halverson Cr, North Callahan Creek, South Callahan Creek, West Fork Keeler Creek (xxxiv) UPPER MIDDLE FORK SALMON BASIN: Asher Creek, Automatic Creek, Ayers Creek, Baldwin Creek, Banner Creek, Bear Creek, Bear Valley Creek, Bearskin Creek, Beaver Creek, Bernard Creek, Big Chief Creek, Big Cottonwood Creek, Birch Creek, Blue Lake Creek, Blue Moon Creek, Boundary Creek, Bridge Creek, Browning Creek, Buck Creek, Burn Creek, Cabin Creek, Cache Creek, Camp Creek, Canyon Creek, Cap Creek, Cape Horn Creek, Casner Creek, Castle Fork, Casto Creek, Cat Creek, Chokebore Creek, Chuck Creek, Cliff Creek, Cold Creek, Collie Creek, Colt Creek, Cook Creek, Corley Creek, Cornish Creek, Cottonwood Creek, Cougar Creek, Crystal Creek, Cub Creek, Cultus Creek, Dagger Creek, Deer Creek, Deer Horn Creek, Doe Creek, Dry Creek, Duffield Creek, Dynamite Creek, Eagle Creek, East Fork Elk Creek, East Fork Indian Creek, East Fork Mayfield Creek, Elk Creek, Elkhorn Creek, Endoah Creek, Fall Creek, Fawn Creek, Feltham Creek, Fir Creek, Flat Creek, Float Creek, Foresight Creek, Forty-five Creek, Forty-four Creek, Fox Creek, Full Moon Creek, Fuse Creek, Grays Creek, Grenade Creek, Grouse Creek, Gun Creek, Half Moon Creek, Hogback Creek, Honeymoon Creek, Hot Creek, Ibex Creek, Indian Creek, Jose Creek, Kelly Creek, Kerr Creek, Knapp Creek, Kwiskwis Creek, Lime Creek, Lincoln Creek, Little Beaver Creek, Little Cottonwood Creek, Little East Fork Elk Creek, Little Indian Creek, Little Loon Creek, Little Pistol Creek, Lola Creek, Loon Creek, Lucinda Creek, Lucky Creek, Luger Creek, Mace Creek, Mack Creek, Marble Creek, Marlin Creek, Marsh Creek, Mayfield Creek, McHoney Creek, McKee Creek, Merino Creek, Middle Fork Elkhorn Creek, Middle Fork Indian Creek, Middle Fork Salmon River (above Soldier Creek), Mine Creek, Mink Creek, Moonshine Creek, Mowitch Creek, Muskeg Creek, Mystery Creek, Nelson Creek, New Creek, No Name Creek, North Fork Elk Creek, North Fork Elkhorn Creek, North Fork Sheep Creek, North Fork Sulphur Creek, Papoose Creek, Parker Creek, Patrol Creek, Phillips Creek, Pierson Creek, Pinyon Creek, Pioneer Creek, Pistol Creek, Placer Creek, Poker Creek, Pole Creek, Popgun Creek, Porter Creek, Prospect Creek, Rabbit Creek, Rams Horn Creek, Range Creek, Rapid River, Rat Creek, Remington Creek, Rock Creek, Rush Creek, Sack Creek, Safety Creek, Salt Creek, Savage Creek, Scratch Creek, Seafoam Creek, Shady Creek, Shake Creek, Sheep Creek, Sheep Trail Creek, Shell Creek, Shrapnel Creek, Siah Creek, Silver Creek, Slide Creek, Snowshoe Creek, Soldier Creek, South Fork Cottonwood Creek, South Fork Sheep Creek, Spike Creek, Springfield Creek, Squaw Creek, Sulphur Creek, Sunnyside Creek, Swamp Creek, Tennessee Creek, Thatcher Creek, Thicket Creek, Thirty-two Creek, Tomahawk Creek, Trail Creek, Trapper Creek, Trigger Creek, Twenty-two Creek, Vader Creek, Vanity Creek, Velvet Creek, Walker Creek, Wampum Creek, Warm Spring Creek, West Fork Elk Creek, West Fork Little Loon Creek, West Fork Mayfield Creek, White Creek, Wickiup Creek, Winchester Creek, Winnemucca Creek, Wyoming Creek. (xxxv) UPPER NORTH FORK CLEARWATER BASIN: Adams Creek, Avalanche Creek, Bacon Creek, Ball Creek, Barn Creek, Barnard Creek, Barren Creek, Bear Creek, Beaver Dam Creek, Bedrock Creek, Bill Creek, Bostonian Creek, Boundary Creek, Burn Creek, Butter Creek, Camp George Creek, Canyon Creek, Cayuse Creek, Chamberlain Creek, Clayton Creek, Cliff Creek, Coffee Creek, Cold Springs Creek, Collins Creek, Colt Creek, Cool Creek, Copper Creek, Corral Creek, Cougar Creek, Craig Creek, Crater Creek, Cub Creek, Davis Creek, Deadwood Creek, Deer Creek, Dill Creek, Drift Creek, Elizabeth Creek, Fall Creek, Fire Creek, Fix Creek, Flame Creek, Fly Creek, Fourth of July Creek, Fro Creek, Frog Creek, Frost Creek, Gilfillian Creek, Goose Creek, Grass Creek, Gravey Creek, Grizzly Creek, Hanson Creek, Heather Creek, Henry Creek, Hidden Creek, Howard Creek, Independence Creek, Jam Creek, Japanese Creek, Johnagan Creek, Johnny Creek, Junction Creek, Kelly Creek, Kid Lake Creek, Kodiak Creek, Lake Creek, Laundry Creek, Lightning Creek, Little Moose Creek, Little Weitas Creek, Liz Creek, Long Creek, Marten Creek, Meadow Creek, Middle Creek, Middle North Fork Kelly Creek, Mill Creek, Mire Creek, Monroe Creek, Moose Creek, Negro Creek, Nettle Creek, Niagra Gulch, North Fork Clearwater River (Fourth of July Creek), Nub Creek, Osier Creek, Perry Creek, Pete Ott Creek, Placer Creek, Polar Creek, Post Creek, Potato Creek, Quartz Creek, Rapid Creek, Rawhide Creek, Roaring Creek, Rock Creek, Rocky Ridge Creek, Ruby Creek, Saddle Creek, Salix Creek, Scurry Creek, Seat Creek, Short Creek, Shot Creek, Siam Creek, Silver Creek, Skull Creek, Slide Creek, Smith Creek, Snow Creek, South Fork Kelly Creek, Spud Creek, Spy Creek, Stolen Creek, Stove Creek, Sugar Creek, Swamp Creek, Tinear Creek, Tinkle Creek, Toboggan Creek, Trail Creek, Vanderbilt Gulch, Wall Creek, Weitas Creek, Williams Creek, Windy Creek, Wolf Creek, Young Creek. (xxxvi) UPPER SALMON BASIN: Alder Creek, Alpine Creek, Alta Creek, Alturas Lake Creek, Anderson Creek, Aspen Creek, Basin Creek, Bayhorse Creek, Bear Creek, Beaver Creek, Big Boulder Creek, Block Creek, Blowfly Creek, Blue Creek, Boundary Creek, Bowery Creek, Broken Ridge Creek, Bruno Creek, Buckskin Creek, Cabin Creek, Camp Creek, Cash Creek, Challis Creek, Chamberlain Creek, Champion Creek, Cherry Creek, Cinnabar Creek, Cleveland Creek, Coal Creek, Crooked Creek, Darling Creek, Deadwood Creek, Decker Creek, Deer Creek, Dry Creek, Duffy Creek, East Basin Creek, East Fork Salmon River, East Fork Valley Creek, East Pass Creek, Eddy Creek, Eightmile Creek, Elevenmile Creek, Elk Creek, Ellis Creek, Estes Creek, First Creek, Fisher Creek, Fishhook Creek, Fivemile Creek, Fourth of July Creek, Frenchman Creek, Garden Creek, Germania Creek, Goat Creek, Gold Creek, Gooseberry Creek, Greylock Creek, Hay Creek, Hell Roaring Creek, Herd Creek, Huckleberry Creek, Iron Creek, Job Creek, Jordan Creek, Juliette Creek, Kelly Creek, Kinnikinic Creek, Lick Creek, Lightning Creek, Little Basin Creek, Little Beaver Creek, Little Boulder Creek, Little West Fork Morgan Creek, Lodgepole Creek, Lone Pine Creek, Lost Creek, MacRae Creek, Martin Creek, McKay Creek, Meadow Creek, Mill Creek, Morgan Creek, Muley Creek, Ninemile Creek, Noho Creek, Pack Creek, Park Creek, Pat Hughes Creek, Pig Creek, Pole Creek, Pork Creek, Prospect Creek, Rainbow Creek, Redfish Lake Creek, Road Creek, Rough Creek, Sage Creek, Sagebrush Creek, Salmon River (Redfish Lake Creek), Sawmill Creek, Second Creek, Sevenmile Creek, Sheep Creek, Short Creek, Sixmile Creek, Slate Creek, Smiley Creek, South Fork East Fork Salmon River, Squaw Creek, Stanley Creek, Stephens Creek, Summit Creek, Sunday Creek, Swimm Creek, Taylor Creek, Tenmile Creek, Tennel Creek, Thompson Creek, Three Cabins Creek, Trail Creek, Trap Creek, Trealor Creek, Twelvemile Creek, Twin Creek, Valley Creek, Van Horn Creek, Vat Creek, Warm Spring Creek, Warm Springs Creek, Washington Creek, West Beaver Creek, West Fork Creek, West Fork East Fork Salmon River, West Fork Herd Creek, West Fork Morgan Creek, West Fork Yankee Fork, West Pass Creek, Wickiup Creek, Williams Creek, Willow Creek, Yankee Fork. (xxxvii) UPPER SELWAY BASIN: Basin Creek, Bear Creek, Burn Creek, Camp Creek, Canyon Creek, Cliff Creek, Comb Creek, Cooper Creek, Cub Creek, Deep Creek, Eagle Creek, Elk Creek, Fall Creek, Fox Creek, Goat Creek, Gold Pan Creek, Granite Creek, Grass Gulch, Haystack Creek, Hells Half Acre Creek, Indian Creek, Kim Creek, Lake Creek, Langdon Gulch, Little Clearwater River, Lodge Creek, Lunch Creek, Mist Creek, Paloma Creek, Paradise Creek, Peach Creek, Pettibone Creek, Running Creek, Saddle Gulch, Schofield Creek, Selway River (above Pettibone Creek), South Fork Running Creek, South Fork Saddle Gulch, South Fork Surprise Creek, Spruce Creek, Squaw Creek, Stripe Creek, Surprise Creek, Set Creek, Tepee Creek, Thirteen Creek, Three Lakes Creek, Triple Creek, Wahoo Creek, White Cap Creek, Wilkerson Creek, Witter Creek. (xxxviii) WEISER BASIN: Anderson Creek, Bull Corral Creek, Dewey Creek, East Fork Weiser River, Little Weiser River, above Anderson Creek, Sheep Creek, Wolf Creek. (3) Procedures for site specific modification of listed waterbodies or temperature criteria for bull trout. (i) The Regional Administrator may, in his discretion, determine that the temperature criteria in paragraph (a)(1) of this section shall not apply to a specific waterbody or portion thereof listed in paragraph (a)(2) of this section. Any such determination shall be made consistent with § 131.11 and shall be based on a finding that bull trout spawning and rearing is not an existing use in such waterbody or portion thereof. (ii) The Regional Administrator may, in his discretion, raise the temperature criteria in paragraph (a)(1) of this section as they pertain to a specific waterbody or portion thereof listed in paragraph (a)(2) of this section. Any such determination shall be made consistent with § 131.11, and shall be based on a finding that bull trout would be fully supported at the higher temperature criteria. (iii) For any determination made under paragraphs (a)(3)(i) or (a)(3)(ii) of this section, the Regional Administrator shall, prior to making such a determination, provide for public notice of and comment on a proposed determination. For any such proposed determination, the Regional Administrator shall prepare and make available to the public a technical support document addressing each waterbody or portion thereof that would be deleted or modified and the justification for each proposed determination. This document shall be made available to the public not later than the date of public notice. (iv) The Regional Administrator shall maintain and make available to the public an updated list of determinations made pursuant to paragraphs (a)(3)(i) and (a)(3)(ii) of this section as well as the technical support documents for each determination. (v) Nothing in this paragraph (a)(3) shall limit the Administrator's authority to modify the temperature criteria in paragraph (a)(1) of this section or the list of waterbodies in paragraph (a)(2) of this section through rulemaking. (b) [Reserved] (c) Excluded waters. [62 FR 41183, July 31, 1997, as amended at 67 FR 11248, Mar. 13, 2002; 73 FR 65739, Nov. 5, 2008] § 131.34 Kansas. (a) In addition to the State-adopted use designations, the following water body segment in Kansas is designated for an expected aquatic life use: Stream segment name HUC8 Segment # Designated use Basin: Missouri Subbasin: Independence-Sugar Whiskey Creek 10240011 235 Expected Aquatic Life. (b) In addition to the State-adopted use designations, the following water body segments and lakes in Kansas are designated for recreation uses as specified in the following table: Stream segment name HUC8 Segment # Designated use Basin: Cimarron Subbasin: Upper Cimarron-Bluff Big Sandy Creek 11040008 6 Primary Contact Recreation Gyp Creek 11040008 25 Secondary Contact Recreation Indian Creek 11040008 14 Secondary Contact Recreation Kiger Creek 11040008 8 Secondary Contact Recreation Stink Creek 11040008 17 Secondary Contact Recreation Two Mile Creek 11040008 15 Secondary Contact Recreation Subbasin: Lower Cimarron-Eagle Chief Anderson Creek 11050001 39 Primary Contact Recreation Basin: Kansas/Lower Republican Subbasin: Middle Republican Antelope Creek 10250016 66 Secondary Contact Recreation Ash Creek 10250016 65 Secondary Contact Recreation Bean Creek 10250016 76 Secondary Contact Recreation Cora Creek 10250016 51 Secondary Contact Recreation Crow Creek (Crystal Creek) 10250016 52 Secondary Contact Recreation Korb Creek 10250016 72 Primary Contact Recreation Long Branch 10250016 68 Secondary Contact Recreation Lost Creek 10250016 53 Primary Contact Recreation Louisa Creek 10250016 61 Secondary Contact Recreation Norway Creek 10250016 73 Secondary Contact Recreation Oak Creek 10250016 75 Secondary Contact Recreation Rebecca Creek 10250016 39 Secondary Contact Recreation Spring Creek 10250016 71 Secondary Contact Recreation Spring Creek 10250016 78 Secondary Contact Recreation Taylor Creek 10250016 74 Secondary Contact Recreation Walnut Creek 10250016 40 Primary Contact Recreation Walnut Creek 10250016 46 Secondary Contact Recreation White Rock Creek, North Branch 10250016 60 Secondary Contact Recreation Wolf Creek 10250016 67 Secondary Contact Recreation Subbasin: Lower Republican Cool Creek 10250017 50 Secondary Contact Recreation Elm Creek, West Branch 10250017 59 Secondary Contact Recreation Gar Creek 10250017 12 Primary Contact Recreation Mud Creek 10250017 63 Secondary Contact Recreation Turkey Creek 10250017 51 Secondary Contact Recreation Subbasin: Upper Kansas Dry Creek 10270101 19 Primary Contact Recreation Humbolt Creek 10270101 10 Primary Contact Recreation Kitten Creek 10270101 14 Primary Contact Recreation Little Arkansas Creek 10270101 13 Primary Contact Recreation Little Kitten Creek 10270101 16 Primary Contact Recreation Mulberry Creek 10270101 20 Secondary Contact Recreation Subbasin: Middle Kansas Adams Creek 10270102 53 Secondary Contact Recreation Bartlett Creek 10270102 55 Secondary Contact Recreation Big Elm Creek 10270102 90 Secondary Contact Recreation Blackjack Creek 10270102 64 Secondary Contact Recreation Blacksmith Creek 10270102 102 Secondary Contact Recreation Bourbonais Creek 10270102 63 Primary Contact Recreation Brush Creek 10270102 57 Primary Contact Recreation Coal Creek 10270102 46 Secondary Contact Recreation Coryell Creek 10270102 94 Secondary Contact Recreation Cow Creek 10270102 45 Secondary Contact Recreation Crow Creek 10270102 86 Primary Contact Recreation Darnells Creek 10270102 51 Secondary Contact Recreation Dog Creek 10270102 78 Secondary Contact Recreation Doyle Creek 10270102 69 Primary Contact Recreation Dry Creek 10270102 79 Primary Contact Recreation Dutch Creek 10270102 92 Secondary Contact Recreation Elm Creek 10270102 98 Primary Contact Recreation Elm Creek 10270102 103 Secondary Contact Recreation Elm Slough 10270102 58 Secondary Contact Recreation Emmons Creek 10270102 66 Secondary Contact Recreation French Creek 10270102 19 Primary Contact Recreation Gilson Creek 10270102 47 Secondary Contact Recreation Hendricks Creek 10270102 73 Primary Contact Recreation Hise Creek 10270102 43 Secondary Contact Recreation Indian Creek 10270102 20 Secondary Contact Recreation James Creek 10270102 87 Secondary Contact Recreation Jim Creek 10270102 52 Secondary Contact Recreation Johnson Creek 10270102 84 Secondary Contact Recreation Kuenzli Creek 10270102 82 Secondary Contact Recreation Little Cross Creek 10270102 61 Secondary Contact Recreation Little Muddy Creek 10270102 99 Primary Contact Recreation Loire Creek 10270102 80 Primary Contact Recreation Lost Creek 10270102 60 Secondary Contact Recreation Messhoss Creek 10270102 96 Primary Contact Recreation Mud Creek 10270102 44 Secondary Contact Recreation Mud Creek 10270102 56 Secondary Contact Recreation Muddy Creek, West Fork 10270102 93 Secondary Contact Recreation Mulberry Creek 10270102 42 Secondary Contact Recreation Mulberry Creek 10270102 77 Secondary Contact Recreation Nehring Creek 10270102 81 Primary Contact Recreation Paw Paw Creek 10270102 75 Secondary Contact Recreation Pleasant Hill Run Creek 10270102 23 Primary Contact Recreation Pomeroy Creek 10270102 59 Secondary Contact Recreation Post Creek 10270102 101 Secondary Contact Recreation Pretty Creek 10270102 74 Secondary Contact Recreation Rock Creek 10270102 21 Primary Contact Recreation Rock Creek, East Fork 10270102 22 Secondary Contact Recreation Ross Creek 10270102 35 Secondary Contact Recreation Salt Creek 10270102 88 Secondary Contact Recreation Sand Creek 10270102 65 Secondary Contact Recreation Shunganunga Creek, South Branch 10270102 106 Primary Contact Recreation Snake Creek 10270102 95 Secondary Contact Recreation Snokomo Creek 10270102 85 Secondary Contact Recreation Spring Creek 10270102 48 Secondary Contact Recreation Spring Creek 10270102 54 Primary Contact Recreation Spring Creek 10270102 76 Secondary Contact Recreation Spring Creek 10270102 105 Secondary Contact Recreation Sullivan Creek 10270102 89 Primary Contact Recreation Tecumseh Creek 10270102 107 Secondary Contact Recreation Turkey Creek 10270102 71 Primary Contact Recreation Unnamed Stream 10270102 8 Secondary Contact Recreation Vassar Creek 10270102 100 Secondary Contact Recreation Vermillion Creek 10270102 15 Primary Contact Recreation Walnut Creek 10270102 91 Secondary Contact Recreation Wells Creek 10270102 68 Secondary Contact Recreation Whetstone Creek 10270102 104 Secondary Contact Recreation Wilson Creek 10270102 50 Primary Contact Recreation Wolf Creek 10270102 49 Primary Contact Recreation Subbasin: Delaware Banner Creek 10270103 45 Secondary Contact Recreation Barnes Creek 10270103 39 Secondary Contact Recreation Bills Creek 10270103 47 Secondary Contact Recreation Brush Creek 10270103 44 Secondary Contact Recreation Brush Creek 10270103 54 Primary Contact Recreation Burr Oak Branch 10270103 8 Primary Contact Recreation Catamount Creek 10270103 49 Primary Contact Recreation Cedar Creek, North 10270103 46 Primary Contact Recreation Claywell Creek 10270103 56 Primary Contact Recreation Clear Creek 10270103 19 Primary Contact Recreation Coal Creek 10270103 50 Primary Contact Recreation Grasshopper Creek 10270103 18 Primary Contact Recreation Grasshopper Creek 10270103 20 Primary Contact Recreation Gregg Creek 10270103 24 Primary Contact Recreation Honey Creek 10270103 55 Secondary Contact Recreation Little Grasshopper Creek 10270103 16 Secondary Contact Recreation Little Wild Horse Creek 10270103 57 Primary Contact Recreation Mission Creek 10270103 40 Primary Contact Recreation Nebo Creek 10270103 48 Secondary Contact Recreation Negro Creek 10270103 43 Secondary Contact Recreation Otter Creek 10270103 41 Secondary Contact Recreation Plum Creek 10270103 36 Secondary Contact Recreation Rock Creek 10270103 34 Primary Contact Recreation Rock Creek 10270103 53 Primary Contact Recreation Spring Creek 10270103 42 Primary Contact Recreation Squaw Creek 10270103 38 Secondary Contact Recreation Straight Creek 10270103 28 Secondary Contact Recreation Tick Creek 10270103 52 Primary Contact Recreation Unnamed Stream 10270103 31 Secondary Contact Recreation Walnut Creek 10270103 51 Primary Contact Recreation Wolfley Creek 10270103 27 Secondary Contact Recreation Subbasin: Lower Kansas Baldwin Creek 10270104 69 Secondary Contact Recreation Brush Creek 10270104 49 Secondary Contact Recreation Brush Creek, West 10270104 46 Secondary Contact Recreation Buttermilk Creek 10270104 44 Secondary Contact Recreation Camp Creek 10270104 41 Secondary Contact Recreation Camp Creek 10270104 74 Secondary Contact Recreation Captain Creek 10270104 72 Primary Contact Recreation Chicken Creek 10270104 79 Secondary Contact Recreation Clear Creek 10270104 383 Primary Contact Recreation Cow Creek 10270104 58 Secondary Contact Recreation Crooked Creek 10270104 10 Primary Contact Recreation Crooked Creek 10270104 12 Primary Contact Recreation Dawson Creek 10270104 45 Secondary Contact Recreation Elk Creek 10270104 68 Primary Contact Recreation Full Creek 10270104 52 Primary Contact Recreation Hanson Creek 10270104 437 Secondary Contact Recreation Hog Creek 10270104 54 Secondary Contact Recreation Howard Creek 10270104 43 Secondary Contact Recreation Hulls Branch 10270104 42 Secondary Contact Recreation Indian Creek 10270104 48 Secondary Contact Recreation Jarbalo Creek 10270104 51 Secondary Contact Recreation Kent Creek 10270104 73 Secondary Contact Recreation Kill Creek 10270104 37 Primary Contact Recreation Little Cedar Creek 10270104 76 Primary Contact Recreation Little Mill Creek 10270104 78 Primary Contact Recreation Little Turkey Creek 10270104 62 Primary Contact Recreation Little Wakarusa Creek 10270104 71 Primary Contact Recreation Mission Creek, East 10270104 61 Secondary Contact Recreation Ninemile Creek 10270104 15 Secondary Contact Recreation Ninemile Creek 10270104 17 Primary Contact Recreation Oakley Creek 10270104 56 Secondary Contact Recreation Plum Creek 10270104 50 Secondary Contact Recreation Prairie Creek 10270104 47 Secondary Contact Recreation Rock Creek 10270104 35 Primary Contact Recreation Scatter Creek 10270104 13 Secondary Contact Recreation Spoon Creek 10270104 75 Secondary Contact Recreation Stone Horse Creek 10270104 57 Secondary Contact Recreation Stranger Creek 10270104 7 Primary Contact Recreation Stranger Creek 10270104 8 Primary Contact Recreation Stranger Creek 10270104 9 Primary Contact Recreation Tonganoxie Creek 10270104 14 Primary Contact Recreation Tooley Creek 10270104 379 Secondary Contact Recreation Turkey Creek 10270104 77 Primary Contact Recreation Unnamed Stream 10270104 11 Primary Contact Recreation Unnamed Stream 10270104 16 Secondary Contact Recreation Wakarusa River, Middle Branch 10270104 64 Secondary Contact Recreation Wakarusa River, South Branch 10270104 63 Primary Contact Recreation Washington Creek 10270104 36 Primary Contact Recreation Yankee Tank Creek 10270104 70 Primary Contact Recreation Subbasin: Lower Big Blue Ackerman Creek 10270205 49 Secondary Contact Recreation Black Vermillion River, Clear Fork 10270205 9 Primary Contact Recreation Black Vermillion River, North Fork 10270205 15 Secondary Contact Recreation Black Vermillion River, South Fork 10270205 12 Secondary Contact Recreation Bluff Creek 10270205 573 Primary Contact Recreation Bommer Creek 10270205 40 Secondary Contact Recreation Busksnort Creek 10270205 566 Secondary Contact Recreation Carter Creek 10270205 59 Secondary Contact Recreation Cedar Creek 10270205 56 Secondary Contact Recreation Corndodger Creek 10270205 52 Primary Contact Recreation De Shazer Creek 10270205 55 Secondary Contact Recreation Deadman Creek 10270205 60 Secondary Contact Recreation Deer Creek 10270205 36 Secondary Contact Recreation Dog Walk Creek 10270205 53 Secondary Contact Recreation Dutch Creek 10270205 44 Primary Contact Recreation Elm Creek 10270205 46 Secondary Contact Recreation Elm Creek, North 10270205 41 Secondary Contact Recreation Fancy Creek, North Fork 10270205 61 Secondary Contact Recreation Fancy Creek, West 10270205 29 Primary Contact Recreation Game Fork 10270205 54 Secondary Contact Recreation Hop Creek 10270205 43 Secondary Contact Recreation Indian Creek 10270205 37 Secondary Contact Recreation Jim Creek 10270205 57 Secondary Contact Recreation Johnson Fork 10270205 51 Secondary Contact Recreation Kearney Branch 10270205 58 Secondary Contact Recreation Lily Creek 10270205 39 Secondary Contact Recreation Little Indian Creek 10270205 35 Secondary Contact Recreation Little Timber Creek 10270205 48 Primary Contact Recreation Meadow Creek 10270205 34 Secondary Contact Recreation Mission Creek 10270205 22 Primary Contact Recreation Murdock Creek 10270205 42 Secondary Contact Recreation Otter Creek 10270205 67 Secondary Contact Recreation Otter Creek, North 10270205 62 Primary Contact Recreation Perkins Creek 10270205 47 Secondary Contact Recreation Phiel Creek 10270205 68 Primary Contact Recreation Raemer Creek 10270205 33 Primary Contact Recreation Robidoux Creek 10270205 16 Primary Contact Recreation Schell Creek 10270205 45 Primary Contact Recreation School Branch 10270205 63 Secondary Contact Recreation Scotch Creek 10270205 38 Secondary Contact Recreation Spring Creek 10270205 19 Primary Contact Recreation Spring Creek 10270205 65 Primary Contact Recreation Timber Creek 10270205 64 Primary Contact Recreation Weyer Creek 10270205 50 Secondary Contact Recreation Subbasin: Upper Little Blue Dry Creek 10270206 41 Secondary Contact Recreation Subbasin: Lower Little Blue Ash Creek 10270207 36 Secondary Contact Recreation Beaver Creek 10270207 38 Secondary Contact Recreation Bolling Creek 10270207 42 Secondary Contact Recreation Bowman Creek 10270207 21 Secondary Contact Recreation Buffalo Creek 10270207 32 Secondary Contact Recreation Camp Creek 10270207 35 Secondary Contact Recreation Camp Creek 10270207 44 Primary Contact Recreation Cedar Creek 10270207 40 Secondary Contact Recreation Cherry Creek 10270207 25 Secondary Contact Recreation Coon Creek 10270207 23 Primary Contact Recreation Fawn Creek 10270207 45 Secondary Contact Recreation Gray Branch 10270207 27 Secondary Contact Recreation Humphrey Branch 10270207 24 Secondary Contact Recreation Iowa Creek 10270207 34 Secondary Contact Recreation Jones Creek 10270207 29 Secondary Contact Recreation Joy Creek 10270207 13 Secondary Contact Recreation Lane Branch 10270207 39 Secondary Contact Recreation Malone Creek 10270207 37 Secondary Contact Recreation Melvin Creek 10270207 33 Secondary Contact Recreation Mercer Creek 10270207 43 Primary Contact Recreation Mill Creek, South Fork 10270207 31 Secondary Contact Recreation Myer Creek 10270207 26 Secondary Contact Recreation Riddle Creek 10270207 17 Secondary Contact Recreation Rose Creek 10270207 12 Secondary Contact Recreation Salt Creek 10270207 19 Primary Contact Recreation School Creek 10270207 49 Primary Contact Recreation Silver Creek 10270207 28 Primary Contact Recreation Spring Creek 10270207 15 Secondary Contact Recreation Spring Creek 10270207 30 Secondary Contact Recreation Walnut Creek 10270207 41 Primary Contact Recreation Basin: Lower Arkansas Subbasin: Rattlesnake Spring Creek 11030009 7 Secondary Contact Recreation Subbasin: Gar-Peace Gar Creek 11030010 8 Primary Contact Recreation Subbasin: Cow Blood Creek 11030011 15 Secondary Contact Recreation Deception Creek 11030011 13 Secondary Contact Recreation Dry Creek 11030011 22 Primary Contact Recreation Jarvis Creek 11030011 19 Primary Contact Recreation Little Cheyenne Creek 11030011 7 Primary Contact Recreation Little Cow Creek 11030011 2 Primary Contact Recreation Lost Creek 11030011 17 Secondary Contact Recreation Owl Creek 11030011 18 Primary Contact Recreation Plum Creek 11030011 4 Secondary Contact Recreation Salt Creek 11030011 21 Primary Contact Recreation Spring Creek 11030011 20 Secondary Contact Recreation Subbasin: Little Arkansas Beaver Creek 11030012 26 Primary Contact Recreation Bull Creek 11030012 24 Primary Contact Recreation Dry Creek 11030012 22 Secondary Contact Recreation Dry Turkey Creek 11030012 13 Primary Contact Recreation Emma Creek 11030012 6 Primary Contact Recreation Emma Creek 11030012 7 Primary Contact Recreation Emma Creek, West 11030012 8 Primary Contact Recreation Gooseberry Creek 11030012 17 Primary Contact Recreation Horse Creek 11030012 19 Primary Contact Recreation Jester Creek 11030012 2 Primary Contact Recreation Jester Creek, East Fork 11030012 18 Primary Contact Recreation Kisiwa Creek 11030012 15 Secondary Contact Recreation Lone Tree Creek 11030012 20 Secondary Contact Recreation Mud Creek 11030012 16 Primary Contact Recreation Running Turkey Creek 11030012 25 Secondary Contact Recreation Salt Creek 11030012 21 Primary Contact Recreation Sun Creek 11030012 11 Primary Contact Recreation Turkey Creek 11030012 12 Secondary Contact Recreation Subbasin: Middle Arkansas—Slate Antelope Creek 11030013 25 Primary Contact Recreation Badger Creek 11030013 31 Primary Contact Recreation Beaver Creek 11030013 29 Primary Contact Recreation Beaver Creek 11030013 33 Primary Contact Recreation Big Slough 11030013 11 Primary Contact Recreation Big Slough, South Fork 11030013 35 Primary Contact Recreation Bitter Creek 11030013 28 Primary Contact Recreation Dry Creek 11030013 15 Primary Contact Recreation Dry Creek 11030013 16 Primary Contact Recreation Gypsum Creek 11030013 5 Primary Contact Recreation Hargis Creek 11030013 24 Primary Contact Recreation Lost Creek 11030013 23 Primary Contact Recreation Negro Creek 11030013 20 Primary Contact Recreation Oak Creek 11030013 26 Secondary Contact Recreation Salt Creek 11030013 22 Primary Contact Recreation Spring Creek 11030013 19 Primary Contact Recreation Spring Creek 11030013 21 Primary Contact Recreation Spring Creek 11030013 27 Primary Contact Recreation Spring Creek 11030013 34 Primary Contact Recreation Spring Creek 11030013 37 Primary Contact Recreation Winser Creek 11030013 32 Primary Contact Recreation Subbasin: North Fork Ninnescah Crow Creek 11030014 11 Primary Contact Recreation Dooleyville Creek 11030014 8 Primary Contact Recreation Goose Creek 11030014 10 Primary Contact Recreation Ninnescah River, North Fork 11030014 1 Primary Contact Recreation Ninnescah River, North Fork 11030014 5 Primary Contact Recreation Ninnescah River, North Fork 11030014 6 Primary Contact Recreation Red Rock Creek 11030014 12 Primary Contact Recreation Rock Creek 11030014 13 Primary Contact Recreation Silver Creek 11030014 7 Primary Contact Recreation Spring Creek 11030014 14 Primary Contact Recreation Wolf Creek 11030014 9 Primary Contact Recreation Subbasin: South Fork Ninnescah Coon Creek 11030015 9 Primary Contact Recreation Coon Creek 11030015 17 Primary Contact Recreation Hunter Creek 11030015 14 Primary Contact Recreation Mead Creek 11030015 10 Primary Contact Recreation Mod Creek 11030015 19 Primary Contact Recreation Natrona Creek 11030015 K38 Primary Contact Recreation Negro Creek 11030015 13 Primary Contact Recreation Nester Creek 11030015 15 Primary Contact Recreation Ninnescah River, West Branch South Fork 11030015 5 Primary Contact Recreation Painter Creek 11030015 7 Primary Contact Recreation Pat Creek 11030015 11 Primary Contact Recreation Petyt Creek 11030015 12 Primary Contact Recreation Sand Creek 11030015 18 Primary Contact Recreation Spring Creek 11030015 8 Primary Contact Recreation Wild Run Creek 11030015 16 Primary Contact Recreation Subbasin: Ninnescah Afton Creek 11030016 5 Primary Contact Recreation Clearwater Creek 11030016 4 Primary Contact Recreation Clearwater Creek 11030016 7 Primary Contact Recreation Dry Creek 11030016 16 Primary Contact Recreation Elm Creek 11030016 10 Primary Contact Recreation Garvey Creek 11030016 11 Primary Contact Recreation Sand Creek 11030016 14 Primary Contact Recreation Silver Creek 11030016 12 Primary Contact Recreation Spring Creek 11030016 2 Primary Contact Recreation Spring Creek 11030016 15 Primary Contact Recreation Turtle Creek 11030016 13 Primary Contact Recreation Subbasin: Kaw Lake Blue Branch 11060001 30 Primary Contact Recreation Bullington Creek 11060001 28 Primary Contact Recreation Cedar Creek 11060001 32 Primary Contact Recreation Chilocco Creek 11060001 19 Primary Contact Recreation Crabb Creek 11060001 29 Primary Contact Recreation Ferguson Creek 11060001 38 Primary Contact Recreation Franklin Creek 11060001 35 Primary Contact Recreation Gardners Branch 11060001 39 Primary Contact Recreation Goose Creek 11060001 34 Primary Contact Recreation Myers Creek 11060001 24 Primary Contact Recreation Otter Creek 11060001 20 Primary Contact Recreation Pebble Creek 11060001 26 Primary Contact Recreation Plum Creek 11060001 33 Primary Contact Recreation Riley Creek 11060001 37 Primary Contact Recreation School Creek 11060001 31 Primary Contact Recreation Shellrock Creek 11060001 22 Primary Contact Recreation Silver Creek 11060001 17 Primary Contact Recreation Snake Creek 11060001 25 Primary Contact Recreation Spring Creek 11060001 21 Primary Contact Recreation Turkey Creek 11060001 27 Primary Contact Recreation Wagoner Creek 11060001 36 Primary Contact Recreation Subbasin: Upper Salt Fork Arkansas Ash Creek 11060002 20 Primary Contact Recreation Big Sandy Creek 11060002 5 Primary Contact Recreation Cave Creek 11060002 28 Primary Contact Recreation Deadman Creek 11060002 22 Primary Contact Recreation Dog Creek 11060002 29 Primary Contact Recreation Hackberry Creek 11060002 23 Primary Contact Recreation Indian Creek 11060002 9 Primary Contact Recreation Inman Creek 11060002 21 Primary Contact Recreation Mustang Creek 11060002 31 Primary Contact Recreation Nescatunga Creek, East Branch 11060002 27 Primary Contact Recreation Red Creek 11060002 16 Primary Contact Recreation Spring Creek 11060002 24 Primary Contact Recreation Wildcat Creek 11060002 12 Primary Contact Recreation Yellowstone Creek 11060002 17 Primary Contact Recreation Subbasin: Medicine Lodge Amber Creek 11060003 12 Primary Contact Recreation Antelope Creek 11060003 22 Primary Contact Recreation Bear Creek 11060003 13 Secondary Contact Recreation Bitter Creek 11060003 18 Secondary Contact Recreation Cedar Creek 11060003 20 Primary Contact Recreation Cottonwood Creek 11060003 16 Primary Contact Recreation Crooked Creek 11060003 11 Primary Contact Recreation Litle Mule Creek 11060003 9 Primary Contact Recreation Dry Creek 11060003 21 Secondary Contact Recreation Elm Creek, East Branch South 11060003 10 Primary Contact Recreation Elm Creek, North Branch 11060003 4 Primary Contact Recreation Elm Creek, South Branch 11060003 5 Primary Contact Recreation Little Bear Creek 11060003 19 Primary Contact Recreation Medicine Lodge River, North Branch 11060003 24 Secondary Contact Recreation Mulberry Creek 11060003 14 Primary Contact Recreation Otter Creek 11060003 25 Secondary Contact Recreation Puckett Creek 11060003 15 Primary Contact Recreation Sand Creek 11060003 17 Primary Contact Recreation Soldier Creek 11060003 27 Secondary Contact Recreation Stink Creek 11060003 28 Primary Contact Recreation Turkey Creek 11060003 7 Primary Contact Recreation Wilson Slough 11060003 23 Primary Contact Recreation Subbasin: Lower Salt Fork Arkansas Camp Creek 11060004 68 Primary Contact Recreation Cooper Creek 11060004 71 Primary Contact Recreation Crooked Creek 11060004 24 Primary Contact Recreation Little Sandy Creek 11060004 39 Primary Contact Recreation Little Sandy Creek, East Branch 11060004 65 Primary Contact Recreation Osage Creek 11060004 17 Primary Contact Recreation Plum Creek 11060004 70 Primary Contact Recreation Pond Creek 11060004 18 Primary Contact Recreation Rush Creek 11060004 69 Primary Contact Recreation Salty Creek 11060004 40 Primary Contact Recreation Sandy Creek 11060004 37 Primary Contact Recreation Sandy Creek, West 11060004 56 Primary Contact Recreation Spring Creek 11060004 66 Primary Contact Recreation Unnamed Stream 11060004 25 Primary Contact Recreation Subbasin: Chikaskia Allen Creek 11060005 40 Primary Contact Recreation Baehr Creek 11060005 22 Primary Contact Recreation Beaver Creek 11060005 28 Primary Contact Recreation Beaver Creek 11060005 46 Primary Contact Recreation Big Spring Creek 11060005 34 Primary Contact Recreation Bitter Creek 11060005 4 Primary Contact Recreation Bitter Creek, East 11060005 16 Primary Contact Recreation Blue Stem Creek 11060005 48 Primary Contact Recreation Chicken Creek 11060005 36 Primary Contact Recreation Copper Creek 11060005 42 Primary Contact Recreation Dry Creek 11060005 17 Primary Contact Recreation Duck Creek 11060005 32 Primary Contact Recreation Fall Creek 11060005 14 Primary Contact Recreation Fall Creek, East Branch 11060005 27 Primary Contact Recreation Goose Creek 11060005 38 Primary Contact Recreation Kemp Creek 11060005 49 Primary Contact Recreation Long Creek 11060005 529 Primary Contact Recreation Meridian Creek 11060005 20 Primary Contact Recreation Prairie Creek 11060005 512 Primary Contact Recreation Prairie Creek, East 11060005 516 Primary Contact Recreation Prairie Creek, West 11060005 527 Primary Contact Recreation Red Creek 11060005 43 Primary Contact Recreation Rock Creek 11060005 23 Primary Contact Recreation Rodgers Branch 11060005 26 Primary Contact Recreation Rose Bud Creek 11060005 44 Primary Contact Recreation Rush Creek 11060005 45 Primary Contact Recreation Sand Creek 11060005 11 Primary Contact Recreation Sand Creek, East 11060005 12 Primary Contact Recreation Sandy Creek 11060005 30 Primary Contact Recreation Shoo Fly Creek, East 11060005 19 Secondary Contact Recreation Shore Creek 11060005 35 Primary Contact Recreation Silver Creek 11060005 29 Primary Contact Recreation Skunk Creek 11060005 39 Primary Contact Recreation Spring Branch 11060005 21 Primary Contact Recreation Wild Horse Creek 11060005 41 Primary Contact Recreation Wildcat Creek 11060005 24 Primary Contact Recreation Basin: Marais Des Cygnes Subbasin: Upper Marais Des Cygnes Appanoose Creek 10290101 16 Primary Contact Recreation Appanoose Creek, East 10290101 89 Primary Contact Recreation Batch Creek 10290101 86 Primary Contact Recreation Blue Creek 10290101 81 Primary Contact Recreation Bradshaw Creek 10290101 75 Primary Contact Recreation Cedar Creek 10290101 66 Primary Contact Recreation Cherry Creek 10290101 74 Primary Contact Recreation Chicken Creek 10290101 70 Primary Contact Recreation Chicken Creek 10290101 93 Primary Contact Recreation Coal Creek 10290101 48 Primary Contact Recreation Dry Creek 10290101 57 Primary Contact Recreation Dry Creek 10290101 95 Primary Contact Recreation Duck Creek 10290101 41 Primary Contact Recreation Eightmile Creek 10290101 13 Primary Contact Recreation Frog Creek 10290101 42 Primary Contact Recreation Hard Fish Creek 10290101 47 Primary Contact Recreation Hickory Creek 10290101 8 Primary Contact Recreation Hill Creek 10290101 71 Primary Contact Recreation Iantha Creek 10290101 62 Primary Contact Recreation Jersey Creek 10290101 76 Primary Contact Recreation Kenoma Creek 10290101 64 Primary Contact Recreation Little Rock Creek 10290101 73 Primary Contact Recreation Long Creek 10290101 K36 Primary Contact Recreation Locust Creek 10290101 69 Primary Contact Recreation Middle Creek 10290101 50 Primary Contact Recreation Mosquito Creek 10290101 52 Primary Contact Recreation Mud Creek 10290101 49 Primary Contact Recreation Mud Creek 10290101 78 Primary Contact Recreation Mud Creek 10290101 91 Primary Contact Recreation Mute Creek 10290101 92 Primary Contact Recreation Ottawa Creek 10290101 K25 Primary Contact Recreation Plum Creek 10290101 2 Primary Contact Recreation Plum Creek 10290101 79 Primary Contact Recreation Popcorn Creek 10290101 87 Primary Contact Recreation Pottawatomie Creek, North Fork 10290101 65 Primary Contact Recreation Pottawatomie Creek, South Fork 10290101 67 Primary Contact Recreation Rock Creek 10290101 43 Primary Contact Recreation Rock Creek 10290101 97 Primary Contact Recreation Sac Branch, South Fork 10290101 54 Secondary Contact Recreation Sac Creek 10290101 60 Primary Contact Recreation Salt Creek 10290101 29 Primary Contact Recreation Sand Creek 10290101 82 Primary Contact Recreation Smith Creek 10290101 77 Primary Contact Recreation Spring Creek 10290101 84 Primary Contact Recreation Switzler Creek 10290101 80 Primary Contact Recreation Tauy Creek 10290101 11 Primary Contact Recreation Tauy Creek, West Fork 10290101 K26 Primary Contact Recreation Tequa Creek 10290101 44 Primary Contact Recreation Tequa Creek, East Branch 10290101 46 Primary Contact Recreation Tequa Creek, South Branch 10290101 45 Primary Contact Recreation Thomas Creek 10290101 72 Secondary Contact Recreation Turkey Creek 10290101 4 Primary Contact Recreation Turkey Creek 10290101 6 Primary Contact Recreation Unnamed Stream 10290101 5 Primary Contact Recreation Walnut Creek 10290101 90 Primary Contact Recreation West Fork Eight Mile Creek 10290101 88 Primary Contact Recreation Willow Creek 10290101 94 Primary Contact Recreation Wilson Creek 10290101 83 Primary Contact Recreation Wolf Creek 10290101 96 Primary Contact Recreation Subbasin: Lower Marais Des Cygnes Buck Creek 10290102 44 Primary Contact Recreation Bull Creek 10290102 26 Secondary Contact Recreation Davis Creek 10290102 38 Primary Contact Recreation Dorsey Creek 10290102 22 Primary Contact Recreation Elm Branch 10290102 48 Primary Contact Recreation Elm Branch 10290102 53 Primary Contact Recreation Elm Creek 10290102 40 Primary Contact Recreation Hushpuckney Creek 10290102 37 Primary Contact Recreation Jake Branch 10290102 54 Secondary Contact Recreation Jordan Branch 10290102 36 Primary Contact Recreation Little Bull Creek 10290102 51 Primary Contact Recreation Little Sugar Creek 10290102 33 Primary Contact Recreation Little Sugar Creek, North Fork 10290102 43 Primary Contact Recreation Martin Creek 10290102 26 Primary Contact Recreation Middle Creek 10290102 13 Primary Contact Recreation Middle Creek 10290102 30 Primary Contact Recreation Mound Creek 10290102 35 Primary Contact Recreation Richland Creek 10290102 41 Primary Contact Recreation Rock Creek 10290102 27 Primary Contact Recreation Smith Branch 10290102 47 Primary Contact Recreation Spring Creek 10290102 50 Primary Contact Recreation Sugar Creek 10290102 42 Primary Contact Recreation Turkey Creek 10290102 45 Primary Contact Recreation Walnut Creek 10290102 14 Primary Contact Recreation Walnut Creek 10290102 34 Primary Contact Recreation Walnut Creek 10290102 52 Primary Contact Recreation Wea Creek, North 10290102 21 Primary Contact Recreation Wea Creek, South 10290102 18 Primary Contact Recreation Wea Creek, South 10290102 19 Primary Contact Recreation Wea Creek, South 10290102 20 Primary Contact Recreation Subbasin: Little Osage Clever Creek 10290103 7 Primary Contact Recreation Elk Creek 10290103 11 Primary Contact Recreation Fish Creek 10290103 8 Primary Contact Recreation Indian Creek 10290103 12 Primary Contact Recreation Irish Creek 10290103 9 Primary Contact Recreation Laberdie Creek, East 10290103 13 Primary Contact Recreation Limestone Creek 10290103 5 Primary Contact Recreation Lost Creek 10290103 10 Primary Contact Recreation Reagan Branch 10290103 6 Primary Contact Recreation Subbasin: Marmaton Buck Run 10290104 46 Primary Contact Recreation Bunion Creek 10290104 39 Primary Contact Recreation Cedar Creek 10290104 41 Primary Contact Recreation Drywood Creek, Moores Branch 10290104 17 Primary Contact Recreation Drywood Creek, West Fork 10290104 19 Primary Contact Recreation Elm Creek 10290104 15 Secondary Contact Recreation Hinton Creek 10290104 38 Primary Contact Recreation Lath Branch 10290104 42 Primary Contact Recreation Little Mill Creek 10290104 34 Primary Contact Recreation Mill Creek 10290104 6 Primary Contact Recreation Owl Creek 10290104 45 Primary Contact Recreation Paint Creek 10290104 13 Primary Contact Recreation Paint Creek 10290104 14 Primary Contact Recreation Prong Creek 10290104 44 Secondary Contact Recreation Robinson Branch 10290104 40 Primary Contact Recreation Shiloh Creek 10290104 36 Primary Contact Recreation Sweet Branch 10290104 30 Primary Contact Recreation Tennyson Creek 10290104 31 Primary Contact Recreation Turkey Creek 10290104 33 Primary Contact Recreation Walnut Creek 10290104 32 Primary Contact Recreation Walnut Creek 10290104 47 Primary Contact Recreation Wolfpen Creek 10290104 37 Primary Contact Recreation Wolverine Creek 10290104 35 Primary Contact Recreation Subbasin: South Grand Harless Creek 10290108 67 Primary Contact Recreation Poney Creek 10290108 48 Primary Contact Recreation Basin: Missouri Subbasin: Tarkio-Wolf Cold Ryan Branch 10240005 70 Primary Contact Recreation Coon Creek 10240005 71 Primary Contact Recreation Halling Creek 10240005 68 Primary Contact Recreation Mill Creek 10240005 52 Primary Contact Recreation Rittenhouse Branch 10240005 69 Primary Contact Recreation Spring Creek 10240005 65 Primary Contact Recreation Striker Branch 10240005 72 Primary Contact Recreation Wolf River, Middle Fork 10240005 67 Primary Contact Recreation Wolf River, North Fork 10240005 66 Primary Contact Recreation Wolf River, South Fork 10240005 57 Primary Contact Recreation Unnamed Stream 10240005 55 Primary Contact Recreation Subbasin: South Fork Big Nemaha Burger Creek 10240007 24 Secondary Contact Recreation Deer Creek 10240007 18 Primary Contact Recreation Fisher Creek 10240007 28 Primary Contact Recreation Illinois Creek 10240007 30 Primary Contact Recreation Rattlesnake Creek 10240007 27 Primary Contact Recreation Rock Creek 10240007 20 Primary Contact Recreation Tennessee Creek 10240007 29 Primary Contact Recreation Turkey Creek 10240007 4 Primary Contact Recreation Turkey Creek 10240007 5 Primary Contact Recreation Wildcat Creek 10240007 23 Primary Contact Recreation Wildcat Creek 10240007 22 Primary Contact Recreation Wolf Pen Creek 10240007 25 Primary Contact Recreation Subbasin: Big Nemaha Noharts Creek 10240008 42 Primary Contact Recreation Pedee Creek 10240008 41 Primary Contact Recreation Pony Creek 10240008 38 Primary Contact Recreation Roys Creek 10240008 40 Primary Contact Recreation Subbasin: Independence—Sugar Brush Creek 10240011 26 Primary Contact Recreation Deer Creek 10240011 32 Primary Contact Recreation Fivemile Creek 10240011 35 Primary Contact Recreation Independence Creek, North Branch 10240011 29 Primary Contact Recreation Jordan Creek 10240011 30 Primary Contact Recreation Owl Creek 10240011 33 Primary Contact Recreation Rock Creek 10240011 21 Primary Contact Recreation Salt Creek 10240011 34 Primary Contact Recreation Smith Creek 10240011 28 Primary Contact Recreation Three Mile Creek 10240011 36 Primary Contact Recreation Walnut Creek 10240011 23 Primary Contact Recreation Walnut Creek 10240011 25 Primary Contact Recreation White Clay Creek 10240011 31 Primary Contact Recreation White Clay Creek 10240011 9031 Primary Contact Recreation Whiskey Creek 10240011 235 Primary Contact Recreation Whiskey Creek 10240011 9235 Primary Contact Recreation Subbasin: Lower Missouri—Crooked Brush Creek 10300101 54 Primary Contact Recreation Camp Branch 10300101 56 Primary Contact Recreation Coffee Creek 10300101 57 Primary Contact Recreation Dyke Branch 10300101 55 Primary Contact Recreation Indian Creek 10300101 32 Primary Contact Recreation Negro Creek 10300101 58 Primary Contact Recreation Tomahawk Creek 10300101 53 Primary Contact Recreation Basin: Neosho Subbasin: Neosho Headwaters Allen Creek 11070201 5 Primary Contact Recreation Badger Creek 11070201 45 Primary Contact Recreation Big John Creek 11070201 37 Primary Contact Recreation Bluff Creek 11070201 8 Primary Contact Recreation Crooked Creek 11070201 35 Primary Contact Recreation Dows Creek 11070201 3 Primary Contact Recreation Dows Creek 11070201 4 Primary Contact Recreation Eagle Creek 11070201 25 Primary Contact Recreation Eagle Creek, South 11070201 47 Primary Contact Recreation East Creek 11070201 39 Primary Contact Recreation Elm Creek 11070201 36 Primary Contact Recreation Fourmile Creek 11070201 24 Primary Contact Recreation Fourmile Creek 11070201 48 Primary Contact Recreation Haun Creek 11070201 29 Primary Contact Recreation Horse Creek 11070201 33 Primary Contact Recreation Kahola Creek 11070201 43 Primary Contact Recreation Lairds Creek 11070201 30 Primary Contact Recreation Lanos Creek 11070201 21 Primary Contact Recreation Lebo Creek 11070201 51 Primary Contact Recreation Munkers Creek, East Branch 11070201 31 Primary Contact Recreation Munkers Creek, Middle Branch 11070201 32 Primary Contact Recreation Neosho River, East Fork 11070201 18 Primary Contact Recreation Neosho River, West Fork 11070201 28 Primary Contact Recreation Parkers Creek 11070201 27 Primary Contact Recreation Plum Creek 11070201 50 Primary Contact Recreation Plumb Creek 11070201 49 Primary Contact Recreation Rock Creek 11070201 7 Primary Contact Recreation Rock Creek 11070201 9 Primary Contact Recreation Rock Creek, East Branch 11070201 34 Primary Contact Recreation Spring Creek 11070201 40 Primary Contact Recreation Stillman Creek 11070201 44 Primary Contact Recreation Taylor Creek 11070201 46 Primary Contact Recreation Walker Branch 11070201 42 Primary Contact Recreation Wolf Creek 11070201 41 Primary Contact Recreation Wrights Creek 11070201 38 Primary Contact Recreation Subbasin: Upper Cottonwood Antelope Creek 11070202 19 Primary Contact Recreation Bills Creek 11070202 30 Primary Contact Recreation Bruno Creek 11070202 27 Primary Contact Recreation Catlin Creek 11070202 20 Primary Contact Recreation Clear Creek 11070202 5 Primary Contact Recreation Clear Creek, East Branch 11070202 24 Primary Contact Recreation Coon Creek 11070202 32 Primary Contact Recreation Cottonwood River, South 11070202 17 Primary Contact Recreation Cottonwood River, South 11070202 18 Primary Contact Recreation Doyle Creek 11070202 21 Primary Contact Recreation French Creek 11070202 16 Primary Contact Recreation Mud Creek 11070202 6 Primary Contact Recreation Perry Creek 11070202 23 Primary Contact Recreation Spring Branch 11070202 26 Primary Contact Recreation Spring Creek 11070202 28 Primary Contact Recreation Spring Creek 11070202 29 Primary Contact Recreation Stony Brook 11070202 25 Primary Contact Recreation Turkey Creek 11070202 31 Primary Contact Recreation Subbasin: Lower Cottonwood Beaver Creek 11070203 29 Primary Contact Recreation Bloody Creek 11070203 40 Primary Contact Recreation Buck Creek 11070203 39 Primary Contact Recreation Buckeye Creek 11070203 44 Primary Contact Recreation Bull Creek 11070203 26 Primary Contact Recreation Camp Creek 11070203 14 Primary Contact Recreation Coal Creek 11070203 43 Primary Contact Recreation Collett Creek 11070203 21 Primary Contact Recreation Corn Creek 11070203 47 Primary Contact Recreation Coyne Branch 11070203 33 Primary Contact Recreation Crocker Creek 11070203 46 Primary Contact Recreation Dodds Creek 11070203 15 Primary Contact Recreation Fox Creek 11070203 19 Primary Contact Recreation French Creek 11070203 32 Primary Contact Recreation Gannon Creek 11070203 24 Primary Contact Recreation Gould Creek 11070203 36 Primary Contact Recreation Holmes Creek 11070203 35 Primary Contact Recreation Jacob Creek 11070203 28 Primary Contact Recreation Kirk Creek 11070203 48 Primary Contact Recreation Little Cedar Creek 11070203 11 Primary Contact Recreation Little Cedar Creek 11070203 45 Primary Contact Recreation Middle Creek 11070203 5 Primary Contact Recreation Mile-and-a-half Creek 11070203 13 Secondary Contact Recreation Moon Creek 11070203 31 Primary Contact Recreation Mulvane Creek 11070203 22 Primary Contact Recreation Peyton Creek 11070203 25 Primary Contact Recreation Phenis Creek 11070203 30 Primary Contact Recreation Pickett Creek 11070203 18 Primary Contact Recreation Prather Creek 11070203 23 Primary Contact Recreation Rock Creek 11070203 37 Primary Contact Recreation Schaffer Creek 11070203 17 Primary Contact Recreation School Creek 11070203 16 Primary Contact Recreation Sharpes Creek 11070203 38 Primary Contact Recreation Silver Creek 11070203 34 Primary Contact Recreation Spring Creek 11070203 41 Primary Contact Recreation Stout Run 11070203 27 Primary Contact Recreation Stribby Creek 11070203 20 Primary Contact Recreation Subbasin: Upper Neosho Badger Creek 11070204 42 Primary Contact Recreation Big Creek, North 11070204 16 Primary Contact Recreation Big Creek, South 11070204 17 Primary Contact Recreation Bloody Run 11070204 25 Primary Contact Recreation Carlyle Creek 11070204 47 Primary Contact Recreation Charles Branch 11070204 27 Primary Contact Recreation Cherry Creek 11070204 20 Primary Contact Recreation Coal Creek 11070204 4 Primary Contact Recreation Cottonwood Creek 11070204 48 Primary Contact Recreation Crooked Creek 11070204 44 Primary Contact Recreation Draw Creek 11070204 34 Primary Contact Recreation Goose Creek 11070204 29 Primary Contact Recreation Long Creek 11070204 12 Primary Contact Recreation Martin Creek 11070204 49 Primary Contact Recreation Mud Creek 11070204 26 Primary Contact Recreation Mud Creek 11070204 31 Primary Contact Recreation Onion Creek 11070204 24 Primary Contact Recreation Owl Creek 11070204 19 Primary Contact Recreation Owl Creek 11070204 21 Primary Contact Recreation Plum Creek 11070204 22 Primary Contact Recreation Rock Creek 11070204 7 Primary Contact Recreation Rock Creek 11070204 23 Primary Contact Recreation Rock Creek 11070204 15 Primary Contact Recreation School Creek 11070204 38 Primary Contact Recreation Scott Creek 11070204 40 Primary Contact Recreation Slack Creek 11070204 30 Primary Contact Recreation Spring Creek 11070204 46 Primary Contact Recreation Sutton Creek 11070204 35 Primary Contact Recreation Turkey Branch 11070204 28 Primary Contact Recreation Turkey Creek 11070204 18 Primary Contact Recreation Turkey Creek 11070204 32 Primary Contact Recreation Twiss Creek 11070204 45 Primary Contact Recreation Varvel Creek 11070204 43 Primary Contact Recreation Village Creek 11070204 33 Primary Contact Recreation Wolf Creek 11070204 37 Primary Contact Recreation Subbasin: Middle Neosho Bachelor Creek 11070205 40 Primary Contact Recreation Canville Creek 11070205 16 Primary Contact Recreation Center Creek 11070205 25 Primary Contact Recreation Cherry Creek 11070205 4 Primary Contact Recreation Deer Creek 11070205 27 Primary Contact Recreation Denny Branch 11070205 31 Primary Contact Recreation Elk Creek 11070205 19 Primary Contact Recreation Elm Creek 11070205 43 Primary Contact Recreation Flat Rock Creek 11070205 12 Primary Contact Recreation Flat Rock Creek 11070205 14 Primary Contact Recreation Fourmile Creek 11070205 49 Primary Contact Recreation Grindstone Creek 11070205 42 Primary Contact Recreation Hickory Creek 11070205 10 Primary Contact Recreation Lake Creek 11070205 24 Primary Contact Recreation Lightning Creek 11070205 6 Primary Contact Recreation Lightning Creek 11070205 8 Primary Contact Recreation Limestone Creek 11070205 7 Primary Contact Recreation Little Cherry Creek 11070205 32 Primary Contact Recreation Little Elk Creek 11070205 47 Primary Contact Recreation Little Fly Creek 11070205 26 Secondary Contact Recreation Little Labette Creek 11070205 23 Primary Contact Recreation Little Walnut Creek 11070205 46 Primary Contact Recreation Litup Creek 11070205 36 Primary Contact Recreation Mulberry Creek 11070205 35 Primary Contact Recreation Murphy Creek 11070205 41 Primary Contact Recreation Ogeese Creek 11070205 38 Primary Contact Recreation Pecan Creek 11070205 45 Primary Contact Recreation Plum Creek 11070205 34 Primary Contact Recreation Rock Creek 11070205 48 Primary Contact Recreation Spring Creek 11070205 30 Primary Contact Recreation Stink Branch 11070205 37 Primary Contact Recreation Thunderbolt Creek 11070205 44 Primary Contact Recreation Tolen Creek 11070205 39 Primary Contact Recreation Town Creek 11070205 28 Primary Contact Recreation Turkey Creek 11070205 29 Primary Contact Recreation Walnut Creek 11070205 13 Primary Contact Recreation Wolf Creek 11070205 33 Primary Contact Recreation Subbasin: Lake O' the Cherokees Fourmile Creek 11070206 18 Primary Contact Recreation Tar Creek 11070206 19 Primary Contact Recreation Subbasin: Spring Little Shawnee Creek 11070207 22 Primary Contact Recreation Long Branch 11070207 21 Primary Contact Recreation Shawnee Creek 11070207 17 Primary Contact Recreation Taylor Branch 11070207 25 Primary Contact Recreation Willow Creek 11070207 20 Primary Contact Recreation Basin: Smoky Hill/Saline Subbasin: Middle Smoky Hill Ash Creek 10260006 37 Primary Contact Recreation Big Timber Creek 10260006 24 Primary Contact Recreation Big Timber Creek 10260006 25 Primary Contact Recreation Big Timber Creek 10260006 27 Primary Contact Recreation Blood Creek 10260006 35 Secondary Contact Recreation Buck Creek 10260006 29 Primary Contact Recreation Buffalo Creek 10260006 6 Primary Contact Recreation Clear Creek 10260006 42 Primary Contact Recreation Coal Creek 10260006 34 Primary Contact Recreation Cow Creek 10260006 38 Primary Contact Recreation Eagle Creek 10260006 30 Primary Contact Recreation Fossil Creek 10260006 13 Primary Contact Recreation Goose Creek 10260006 39 Primary Contact Recreation Landon Creek 10260006 31 Primary Contact Recreation Loss Creek 10260006 44 Primary Contact Recreation Mud Creek 10260006 47 Primary Contact Recreation Oxide Creek 10260006 45 Primary Contact Recreation Sellens Creek 10260006 32 Primary Contact Recreation Shelter Creek 10260006 43 Primary Contact Recreation Skunk Creek 10260006 48 Primary Contact Recreation Spring Creek 10260006 41 Primary Contact Recreation Timber Creek 10260006 26 Primary Contact Recreation Turkey Creek 10260006 46 Primary Contact Recreation Unnamed Stream 10260006 20 Primary Contact Recreation Unnamed Stream 10260006 23 Primary Contact Recreation Unnamed Stream 10260006 28 Primary Contact Recreation Wilson Creek 10260006 40 Primary Contact Recreation Wolf Creek 10260006 36 Primary Contact Recreation Subbasin: Lower Smoky Hill Basket Creek 10260008 40 Primary Contact Recreation Battle Creek 10260008 23 Primary Contact Recreation Carry Creek 10260008 32 Primary Contact Recreation Carry Creek 10260008 35 Primary Contact Recreation Chapman Creek, West 10260008 5 Primary Contact Recreation Dry Creek 10260008 36 Primary Contact Recreation Dry Creek, East 10260008 43 Primary Contact Recreation Hobbs Creek 10260008 48 Primary Contact Recreation Holland Creek 10260008 25 Primary Contact Recreation Holland Creek, East 10260008 27 Primary Contact Recreation Holland Creek, West 10260008 26 Primary Contact Recreation Kentucky Creek 10260008 17 Secondary Contact Recreation Kentucky Creek, West 10260008 54 Primary Contact Recreation Lone Tree Creek 10260008 41 Primary Contact Recreation Lyon Creek, West Branch 10260008 34 Primary Contact Recreation Mcallister Creek 10260008 49 Primary Contact Recreation Middle Branch 10260008 58 Primary Contact Recreation Mud Creek 10260008 8 Primary Contact Recreation Otter Creek 10260008 42 Primary Contact Recreation Paint Creek 10260008 52 Secondary Contact Recreation Pewee Creek 10260008 56 Primary Contact Recreation Sand Creek 10260008 46 Primary Contact Recreation Sharps Creek 10260008 16 Secondary Contact Recreation Spring Creek 10260008 45 Primary Contact Recreation Stag Creek 10260008 19 Primary Contact Recreation Turkey Creek 10260008 28 Primary Contact Recreation Turkey Creek 10260008 30 Primary Contact Recreation Turkey Creek, East 10260008 50 Primary Contact Recreation Turkey Creek, West Branch 10260008 29 Primary Contact Recreation Unnamed Stream 10260008 K3 Primary Contact Recreation Unnamed Stream 10260008 K4 Primary Contact Recreation Unnamed Stream 10260008 K24 Primary Contact Recreation Wiley Creek 10260008 47 Primary Contact Recreation Subbasin: Upper Saline Cedar Creek 10260009 30 Secondary Contact Recreation Chalk Creek 10260009 26 Primary Contact Recreation Coyote Creek 10260009 23 Primary Contact Recreation Eagle Creek 10260009 6 Primary Contact Recreation Happy Creek 10260009 25 Primary Contact Recreation Paradise Creek 10260009 5 Primary Contact Recreation Salt Creek 10260009 20 Primary Contact Recreation Spring Creek, East 10260009 10 Primary Contact Recreation Sweetwater Creek 10260009 29 Primary Contact Recreation Trego Creek 10260009 19 Primary Contact Recreation Unnamed Stream 10260009 13 Primary Contact Recreation Wild Horse Creek 10260009 27 Primary Contact Recreation Subbasin: Lower Saline Bacon Creek 10260010 7 Primary Contact Recreation Blue Stem Creek 10260010 33 Primary Contact Recreation Coon Creek 10260010 31 Primary Contact Recreation Dry Creek 10260010 29 Secondary Contact Recreation Eff Creek 10260010 23 Primary Contact Recreation Elkhorn Creek 10260010 17 Primary Contact Recreation Elkhorn Creek, West 10260010 38 Primary Contact Recreation Fourmile Creek 10260010 30 Primary Contact Recreation Lost Creek 10260010 34 Secondary Contact Recreation Owl Creek 10260010 18 Primary Contact Recreation Owl Creek 10260010 39 Primary Contact Recreation Ralston Creek 10260010 28 Primary Contact Recreation Shaw Creek 10260010 41 Primary Contact Recreation Spillman Creek 10260010 6 Primary Contact Recreation Spillman Creek, North Branch 10260010 8 Primary Contact Recreation Spring Creek 10260010 16 Primary Contact Recreation Spring Creek 10260010 19 Primary Contact Recreation Spring Creek 10260010 20 Primary Contact Recreation Spring Creek 10260010 24 Primary Contact Recreation Spring Creek 10260010 26 Primary Contact Recreation Spring Creek 10260010 27 Primary Contact Recreation Table Rock Creek 10260010 40 Primary Contact Recreation Trail Creek 10260010 32 Secondary Contact Recreation Twelvemile Creek 10260010 36 Primary Contact Recreation Twin Creek, West 10260010 37 Secondary Contact Recreation West Spring Creek 10260010 25 Primary Contact Recreation Wolf Creek 10260010 10 Primary Contact Recreation Wolf Creek, East Fork 10260010 11 Primary Contact Recreation Wolf Creek, West Fork 10260010 12 Primary Contact Recreation Yauger Creek 10260010 35 Primary Contact Recreation Basin: Solomon Subbasin: Upper North Fork Solomon Ash Creek 10260011 24 Primary Contact Recreation Beaver Creek 10260011 23 Primary Contact Recreation Big Timber Creek 10260011 8 Primary Contact Recreation Bow Creek 10260011 15 Primary Contact Recreation Cactus Creek 10260011 28 Primary Contact Recreation Crooked Creek 10260011 6 Primary Contact Recreation Elk Creek 10260011 12 Primary Contact Recreation Elk Creek, East 10260011 25 Primary Contact Recreation Game Creek 10260011 10 Primary Contact Recreation Game Creek 10260011 27 Primary Contact Recreation Lost Creek 10260011 20 Primary Contact Recreation Sand Creek 10260011 26 Primary Contact Recreation Scull Creek 10260011 21 Primary Contact Recreation Spring Creek 10260011 19 Primary Contact Recreation Wolf Creek 10260011 22 Primary Contact Recreation Subbasin: Lower North Fork Solomon Beaver Creek 10260012 10 Primary Contact Recreation Beaver Creek, East Branch 10260012 11 Primary Contact Recreation Beaver Creek, Middle 10260012 12 Primary Contact Recreation Beaver Creek, Middle 10260012 13 Primary Contact Recreation Beaver Creek, West 10260012 14 Secondary Contact Recreation Big Creek 10260012 26 Primary Contact Recreation Boughton Creek 10260012 34 Primary Contact Recreation Buck Creek 10260012 43 Secondary Contact Recreation Cedar Creek 10260012 16 Primary Contact Recreation Cedar Creek 10260012 18 Primary Contact Recreation Cedar Creek, East 10260012 17 Primary Contact Recreation Cedar Creek, East Middle 10260012 37 Primary Contact Recreation Cedar Creek, Middle 10260012 19 Secondary Contact Recreation Deer Creek 10260012 23 Primary Contact Recreation Deer Creek 10260012 25 Primary Contact Recreation Deer Creek 10260012 27 Primary Contact Recreation Deer Creek 10260012 29 Primary Contact Recreation Deer Creek 10260012 31 Primary Contact Recreation Dry Creek 10260012 42 Primary Contact Recreation Glen Rock Creek 10260012 41 Primary Contact Recreation Lawrence Creek 10260012 44 Primary Contact Recreation Lindley Creek 10260012 45 Primary Contact Recreation Little Oak Creek 10260012 3 Primary Contact Recreation Medicine Creek 10260012 33 Primary Contact Recreation Oak Creek 10260012 2 Primary Contact Recreation Oak Creek 10260012 4 Primary Contact Recreation Oak Creek, East 10260012 40 Primary Contact Recreation Oak Creek, West 10260012 39 Secondary Contact Recreation Plotner Creek 10260012 30 Primary Contact Recreation Plum Creek 10260012 20 Primary Contact Recreation Spring Creek 10260012 8 Secondary Contact Recreation Spring Creek 10260012 28 Secondary Contact Recreation Starvation Creek 10260012 38 Primary Contact Recreation Turner Creek 10260012 24 Primary Contact Recreation Subbasin: Upper South Fork Solomon Spring Creek 10260013 5 Primary Contact Recreation Subbasin: Lower South Fork Solomon Ash Creek 10260014 22 Primary Contact Recreation Boxelder Creek 10260014 14 Primary Contact Recreation Carr Creek 10260014 21 Primary Contact Recreation Covert Creek 10260014 19 Primary Contact Recreation Crooked Creek 10260014 27 Primary Contact Recreation Dibble Creek 10260014 23 Primary Contact Recreation Elm Creek 10260014 15 Primary Contact Recreation Jim Creek 10260014 25 Primary Contact Recreation Kill Creek 10260014 18 Primary Contact Recreation Kill Creek, East 10260014 28 Primary Contact Recreation Lost Creek 10260014 13 Primary Contact Recreation Lucky Creek 10260014 26 Primary Contact Recreation Medicine Creek 10260014 16 Primary Contact Recreation Medicine Creek 10260014 17 Primary Contact Recreation Robbers Roost Creek 10260014 24 Primary Contact Recreation Twin Creek 10260014 20 Primary Contact Recreation Twin Creek, East 10260014 29 Primary Contact Recreation Subbasin: Solomon River Cow Creek 10260015 28 Primary Contact Recreation Fifth Creek 10260015 45 Secondary Contact Recreation Granite Creek 10260015 24 Secondary Contact Recreation Leban Creek 10260015 41 Secondary Contact Recreation Mill Creek 10260015 38 Secondary Contact Recreation Mulberry Creek 10260015 36 Secondary Contact Recreation Pipe Creek 10260015 9 Primary Contact Recreation Walnut Creek 10260015 26 Secondary Contact Recreation Basin: Upper Arkansas Subbasin: Buckner Buckner Creek, South Fork 11030006 6 Primary Contact Recreation Duck Creek 11030006 8 Secondary Contact Recreation Elm Creek 11030006 5 Primary Contact Recreation Saw Log Creek 11030006 3 Primary Contact Recreation Saw Log Creek 11030006 4 Secondary Contact Recreation Subbasin: Lower Walnut Creek Alexander Dry Creek 11030008 7 Secondary Contact Recreation Bazine Creek 11030008 9 Secondary Contact Recreation Boot Creek 11030008 15 Secondary Contact Recreation Dry Creek 11030008 14 Secondary Contact Recreation Dry Walnut Creek 11030008 13 Secondary Contact Recreation Otter Creek 11030008 12 Primary Contact Recreation Sand Creek 11030008 3 Secondary Contact Recreation Sandy Creek 11030008 11 Secondary Contact Recreation Walnut Creek 11030008 1 Primary Contact Recreation Walnut Creek 11030008 2 Primary Contact Recreation Walnut Creek 11030008 4 Primary Contact Recreation Basin: Upper Republican Subbasin: South Fork Republican Big Timber Creek 10250003 61 Secondary Contact Recreation Subbasin: Beaver Beaver Creek 10250014 2 Secondary Contact Recreation Basin: Verdigris Subbasin: Upper Verdigris Bachelor Creek 11070101 21 Primary Contact Recreation Bernard Creek 11070101 24 Secondary Contact Recreation Big Cedar Creek 11070101 39 Primary Contact Recreation Brazil Creek 11070101 31 Primary Contact Recreation Buffalo Creek 11070101 2 Primary Contact Recreation Buffalo Creek, West 11070101 34 Primary Contact Recreation Cedar Creek 11070101 32 Primary Contact Recreation Chetopa Creek 11070101 22 Primary Contact Recreation Crooked Creek 11070101 38 Primary Contact Recreation Dry Creek 11070101 27 Primary Contact Recreation Elder Branch 11070101 37 Primary Contact Recreation Fancy Creek 11070101 28 Primary Contact Recreation Greenhall Creek 11070101 26 Primary Contact Recreation Holderman Creek 11070101 47 Primary Contact Recreation Homer Creek 11070101 20 Primary Contact Recreation Kelly Branch 11070101 42 Primary Contact Recreation Kuntz Branch 11070101 29 Primary Contact Recreation Little Sandy Creek 11070101 33 Primary Contact Recreation Long Creek 11070101 45 Primary Contact Recreation Miller Creek 11070101 30 Primary Contact Recreation Moon Branch 11070101 43 Primary Contact Recreation Onion Creek 11070101 23 Primary Contact Recreation Rock Creek 11070101 14 Primary Contact Recreation Ross Branch 11070101 35 Primary Contact Recreation Sandy Creek 11070101 4 Primary Contact Recreation Shaw Creek 11070101 40 Primary Contact Recreation Slate Creek 11070101 25 Primary Contact Recreation Snake Creek 11070101 36 Primary Contact Recreation Tate Branch Creek 11070101 44 Primary Contact Recreation Van Horn Creek 11070101 46 Primary Contact Recreation Verdigris River, Bernard Branch 11070101 16 Primary Contact Recreation Verdigris River, North Branch 11070101 13 Primary Contact Recreation Verdigris River, North Branch 11070101 15 Primary Contact Recreation Walnut Creek 11070101 19 Primary Contact Recreation West Creek 11070101 17 Primary Contact Recreation Wolf Creek 11070101 41 Primary Contact Recreation Subbasin: Fall Battle Creek 11070102 18 Primary Contact Recreation Burnt Creek 11070102 24 Primary Contact Recreation Clear Creek 11070102 37 Primary Contact Recreation Coon Creek 11070102 25 Primary Contact Recreation Coon Creek 11070102 36 Primary Contact Recreation Crain Creek 11070102 32 Primary Contact Recreation Honey Creek 11070102 26 Primary Contact Recreation Indian Creek 11070102 15 Primary Contact Recreation Ivanpah Creek 11070102 19 Primary Contact Recreation Kitty Creek 11070102 27 Primary Contact Recreation Little Indian Creek 11070102 34 Primary Contact Recreation Little Salt Creek 11070102 35 Primary Contact Recreation Oleson Creek 11070102 21 Primary Contact Recreation Otis Creek 11070102 20 Primary Contact Recreation Plum Creek 11070102 30 Primary Contact Recreation Rainbow Creek, East 11070102 17 Primary Contact Recreation Salt Creek 11070102 14 Primary Contact Recreation Salt Creek 11070102 38 Primary Contact Recreation Silver Creek 11070102 33 Primary Contact Recreation Snake Creek 11070102 31 Primary Contact Recreation Spring Creek 11070102 12 Primary Contact Recreation Swing Creek 11070102 989 Primary Contact Recreation Tadpole Creek 11070102 29 Primary Contact Recreation Watson Branch 11070102 23 Primary Contact Recreation Subbasin: Middle Verdigris Big Creek 11070103 21 Primary Contact Recreation Biscuit Creek 11070103 53 Primary Contact Recreation Bluff Run 11070103 54 Primary Contact Recreation Choteau Creek 11070103 63 Primary Contact Recreation Claymore Creek 11070103 50 Primary Contact Recreation Deadman Creek 11070103 57 Primary Contact Recreation Deer Creek 11070103 51 Primary Contact Recreation Drum Creek 11070103 34 Primary Contact Recreation Dry Creek 11070103 37 Primary Contact Recreation Fawn Creek 11070103 56 Primary Contact Recreation Mud Creek 11070103 59 Primary Contact Recreation Onion Creek 11070103 39 Primary Contact Recreation Potato Creek 11070103 31 Primary Contact Recreation Prior Creek 11070103 62 Primary Contact Recreation Pumpkin Creek 11070103 28 Primary Contact Recreation Richland Creek 11070103 49 Primary Contact Recreation Rock Creek 11070103 58 Primary Contact Recreation Rock Creek 11070103 61 Primary Contact Recreation Snow Creek 11070103 25 Primary Contact Recreation Spring Creek 11070103 55 Primary Contact Recreation Sycamore Creek 11070103 52 Primary Contact Recreation Wildcat Creek 11070103 60 Primary Contact Recreation Subbasin: Elk Bachelor Creek 11070104 25 Primary Contact Recreation Bloody Run 11070104 26 Primary Contact Recreation Bull Creek 11070104 33 Primary Contact Recreation Card Creek 11070104 19 Primary Contact Recreation Chetopa Creek 11070104 18 Primary Contact Recreation Clear Creek 11070104 30 Primary Contact Recreation Clear Creek 11070104 32 Primary Contact Recreation Coffey Branch 11070104 20 Primary Contact Recreation Duck Creek 11070104 3 Primary Contact Recreation Elk River, Mound Branch 11070104 15 Primary Contact Recreation Elk River, South Branch 11070104 38 Primary Contact Recreation Elk River, Rowe Branch 11070104 39 Primary Contact Recreation Elm Branch 11070104 23 Primary Contact Recreation Hickory Creek 11070104 28 Primary Contact Recreation Hitchen Creek 11070104 7 Primary Contact Recreation Hitchen Creek, East 11070104 35 Primary Contact Recreation Little Duck Creek 11070104 24 Primary Contact Recreation Little Hitchen Creek 11070104 37 Primary Contact Recreation Painterhood Creek 11070104 5 Primary Contact Recreation Painterhood Creek, East 11070104 36 Primary Contact Recreation Pan Creek 11070104 27 Primary Contact Recreation Pawpaw Creek 11070104 11 Primary Contact Recreation Racket Creek 11070104 21 Primary Contact Recreation Rock Creek 11070104 13 Primary Contact Recreation Salt Creek 11070104 17 Primary Contact Recreation Salt Creek, South 11070104 29 Primary Contact Recreation Skull Creek 11070104 31 Primary Contact Recreation Snake Creek 11070104 34 Primary Contact Recreation Sycamore Creek 11070104 22 Primary Contact Recreation Wildcat Creek 11070104 16 Primary Contact Recreation Subbasin: Caney Bachelor Creek 11070106 47 Primary Contact Recreation Bee Creek 11070106 9 Primary Contact Recreation California Creek 11070106 48 Primary Contact Recreation Caney Creek 11070106 12 Primary Contact Recreation Caney River, East Fork 11070106 52 Primary Contact Recreation Caney Creek, North 11070106 11 Primary Contact Recreation Cedar Creek 11070106 30 Primary Contact Recreation Cedar Creek 11070106 32 Primary Contact Recreation Cheyenne Creek 11070106 40 Primary Contact Recreation Coon Creek 11070106 36 Primary Contact Recreation Corum Creek 11070106 51 Primary Contact Recreation Cotton Creek 11070106 38 Primary Contact Recreation Cotton Creek, North Fork 11070106 37 Primary Contact Recreation Dry Creek 11070106 29 Primary Contact Recreation Fly Creek 11070106 46 Primary Contact Recreation Illinois Creek 11070106 39 Primary Contact Recreation Jim Creek 11070106 49 Primary Contact Recreation Lake Creek 11070106 34 Primary Contact Recreation Otter Creek 11070106 33 Primary Contact Recreation Pool Creek 11070106 43 Primary Contact Recreation Possum Trot Creek 11070106 74 Primary Contact Recreation Rock Creek 11070106 28 Primary Contact Recreation Spring Creek 11070106 44 Primary Contact Recreation Spring Creek 11070106 53 Primary Contact Recreation Squaw Creek 11070106 42 Primary Contact Recreation Sycamore Creek 11070106 31 Primary Contact Recreation Turkey Creek 11070106 45 Primary Contact Recreation Union Creek 11070106 41 Primary Contact Recreation Wolf Creek 11070106 35 Primary Contact Recreation Wolf Creek 11070106 50 Primary Contact Recreation Basin: Walnut Subbasin: Upper Walnut River Badger Creek 11030017 36 Primary Contact Recreation Bemis Creek 11030017 8 Primary Contact Recreation Cole Creek 11030017 15 Primary Contact Recreation Constant Creek 11030017 41 Primary Contact Recreation Dry Creek 11030017 27 Primary Contact Recreation Dry Creek 11030017 32 Primary Contact Recreation Durechen Creek 11030017 12 Primary Contact Recreation Elm Creek 11030017 43 Primary Contact Recreation Fourmile Creek 11030017 20 Primary Contact Recreation Gilmore Branch 11030017 39 Primary Contact Recreation Gypsum Creek 11030017 30 Primary Contact Recreation Henry Creek 11030017 33 Primary Contact Recreation Lower Branch 11030017 42 Primary Contact Recreation Prairie Creek 11030017 35 Primary Contact Recreation Rock Creek 11030017 37 Primary Contact Recreation Sand Creek 11030017 29 Primary Contact Recreation Satchel Creek 11030017 10 Primary Contact Recreation School Branch 11030017 45 Primary Contact Recreation Sutton Creek 11030017 40 Primary Contact Recreation Walnut Creek 11030017 44 Primary Contact Recreation Whitewater Creek 11030017 34 Primary Contact Recreation Whitewater Creek, East Branch 11030017 31 Primary Contact Recreation Whitewater River, East Branch 11030017 22 Primary Contact Recreation Whitewater River, West Branch 11030017 24 Primary Contact Recreation Whitewater River, West Branch 11030017 25 Primary Contact Recreation Wildcat Creek 11030017 26 Primary Contact Recreation Wildcat Creek, West 11030017 28 Primary Contact Recreation Subbasin: Lower Walnut River Black Crook Creek 11030018 18 Primary Contact Recreation Cedar Creek 11030018 19 Secondary Contact Recreation Chigger Creek 11030018 21 Primary Contact Recreation Crooked Creek 11030018 31 Primary Contact Recreation Durham Creek 11030018 23 Primary Contact Recreation Dutch Creek 11030018 2 Primary Contact Recreation Dutch Creek 11030018 4 Primary Contact Recreation Eightmile Creek 11030018 30 Primary Contact Recreation Foos Creek 11030018 26 Primary Contact Recreation Hickory Creek 11030018 12 Primary Contact Recreation Honey Creek 11030018 33 Primary Contact Recreation Little Dutch Creek 11030018 27 Primary Contact Recreation Lower Dutch Creek 11030018 20 Primary Contact Recreation Plum Creek 11030018 36 Primary Contact Recreation Polecat Creek 11030018 17 Primary Contact Recreation Posey Creek 11030018 37 Primary Contact Recreation Richland Creek 11030018 25 Primary Contact Recreation Rock Creek, North Branch 11030018 35 Primary Contact Recreation Sanford Creek 11030018 29 Primary Contact Recreation Spring Branch 11030018 32 Primary Contact Recreation Stalter Branch 11030018 24 Primary Contact Recreation Stewart Creek 11030018 28 Primary Contact Recreation Swisher Branch 11030018 22 Primary Contact Recreation Total = 1186 Lake name County Designated use Basin: Cimarron Subbasin: Upper Cimarron (HUC 11040002) Moss Lake East MORTON Primary Contact Recreation Moss Lake West MORTON Primary Contact Recreation Subbasin: North Fork Cimarron (HUC 11040006) Russell Lake STEVENS Primary Contact Recreation Subbasin: Upper Cimarron-Bluff (HUC 11040008) Clark State Fishing Lake CLARK Primary Contact Recreation Saint Jacob's Well CLARK Primary Contact Recreation Basin: Kansas/Lower Republican Subbasin: Middle Republican (HUC 10250016) Lake Jewell JEWELL Primary Contact Recreation Subbasin: Lower Republican (HUC 10250017) Belleville City Lake REPUBLIC Primary Contact Recreation Wakefield Lake CLAY Primary Contact Recreation Subbasin: Middle Kansas (HUC 10270102) Alma City Reservoir WABAUNSEE Primary Contact Recreation Cedar Crest Pond SHAWNEE Primary Contact Recreation Central Park Lake SHAWNEE Primary Contact Recreation Gage Park Lake SHAWNEE Primary Contact Recreation Jeffrey Energy Center Lakes POTTAWATOMIE Primary Contact Recreation Subbasin: Delaware (HUC 10270103) Atchison County Park Lake ATCHISON Primary Contact Recreation Little Lake BROWN Primary Contact Recreation Subbasin: Lower Kansas (HUC 10270104) Douglas County State Lake DOUGLAS Primary Contact Recreation Lenexa Lake JOHNSON Primary Contact Recreation Mahaffie Farmstead Pond JOHNSON Primary Contact Recreation Pierson Park Lake WYANDOTTE Primary Contact Recreation Waterworks Lakes JOHNSON Primary Contact Recreation Subbasin: Lower Big Blue (HUC 10270205) Lake Idlewild MARSHALL Primary Contact Recreation Subbasin: Lower Little Blue (HUC 10270207) Washington County State Fishing Lake WASHINGTON Primary Contact Recreation Basin: Lower Arkansas Subbasin: Rattlesnake (HUC 11030009) Kiowa County State Fishing Lake KIOWA Primary Contact Recreation Subbasin: Cow (HUC 11030011) Barton Lake BARTON Primary Contact Recreation Sterling City Lake RICE Primary Contact Recreation Subbasin: Little Arkansas (HUC 11030012) Dillon Park Lakes #1 RENO Primary Contact Recreation Dillon Park Lake #2 RENO Primary Contact Recreation Newton City Park Lake HARVEY Primary Contact Recreation Subbasin: Middle Arkansas-Slate (HUC 11030013) Belaire Lake SEDGWICK Primary Contact Recreation Buffalo Park Lake SEDGWICK Primary Contact Recreation Emery Park SEDGWICK Primary Contact Recreation Harrison Park Lake SEDGWICK Primary Contact Recreation Riggs Park Lake SEDGWICK Primary Contact Recreation Subbasin: South Fork Ninnescah (HUC 11030015) Lemon Park Lake PRATT Primary Contact Recreation Subbasin: Medicine Lodge (HUC 11060003) Barber County State Fishing Lake BARBER Primary Contact Recreation Subbasin: Lower Salt Fork Arkansas (HUC 11060004) Hargis Lake BARBER Primary Contact Recreation Basin: Marais Des Cygnes Subbasin: Upper Marais Des Cygnes (HUC 10290101) Allen City Lake LYON Primary Contact Recreation Cedar Creek Lake ANDERSON Primary Contact Recreation Crystal Lake ANDERSON Primary Contact Recreation Lyon County State Fishing Lake LYON Primary Contact Recreation Osage City Reservoir OSAGE Primary Contact Recreation Waterworks Impoundment ANDERSON Primary Contact Recreation Subbasin: Lower Marais Des Cygnes (HUC 10290102) Edgerton City Lake JOHNSON Primary Contact Recreation Edgerton South Lake JOHNSON Primary Contact Recreation Lake LaCygne LINN Primary Contact Recreation Louisburg State Fishing Lake MIAMI Primary Contact Recreation Miami County State Fishing Lake MIAMI Primary Contact Recreation Paola City Lake MIAMI Primary Contact Recreation Pleasanton Lake #1 LINN Primary Contact Recreation Pleasanton Lake #2 LINN Primary Contact Recreation Spring Hill City Lake JOHNSON Primary Contact Recreation Subbasin: Marmaton (HUC 10290104) Gunn Park Lake, East BOURBON Primary Contact Recreation Gunn Park Lake, West BOURBON Primary Contact Recreation Rock Creek Lake BOURBON Primary Contact Recreation Basin: Missouri Subbasin: South Fork Big Nemaha (HUC 10240007) Pony Creek Lake NEMAHA Primary Contact Recreation Sabetha City Lake NEMAHA Primary Contact Recreation Subbasin: Independence-Sugar (HUC 10240011) Atchison City Lakes ATCHISON Primary Contact Recreation Big Eleven Lake WYANDOTTE Primary Contact Recreation Doniphan Fair Association Lake DONIPHAN Primary Contact Recreation Jerrys Lake LEAVENWORTH Primary Contact Recreation Lansing City Lake LEAVENWORTH Primary Contact Recreation South Park Lake LEAVENWORTH Primary Contact Recreation Subbasin: Lower Missouri-Crooked (HUC 10300101) Prairie View Park JOHNSON Primary Contact Recreation South Park Lake JOHNSON Primary Contact Recreation Stanley Rural Water District Lake #2 JOHNSON Primary Contact Recreation Stohl Park Lake JOHNSON Primary Contact Recreation Basin: Neosho Subbasin: Lower Cottonwood (HUC 11070203) Peter Pan Pond LYON Primary Contact Recreation Subbasin: Upper Neosho (HUC 11070204) Chanute City (Santa Fe) Lake NEOSHO Primary Contact Recreation Leonard's Lake WOODSON Primary Contact Recreation Subbasin: Middle Neosho (HUC 11070205) Altamont City Lake #1 LABETTE Primary Contact Recreation Bartlett City Lake LABETTE Primary Contact Recreation Harmon Wildlife Area Lakes LABETTE Primary Contact Recreation Mined Land Wildlife Area Lakes CHEROKEE Primary Contact Recreation Timber Lake NEOSHO Primary Contact Recreation Subbasin: Spring (HUC 11070207) Empire Lake CHEROKEE Primary Contact Recreation Frontenac City Park CRAWFORD Primary Contact Recreation Mined Land Wildlife Area Lakes CRAWFORD Primary Contact Recreation Pittsburg College Lake CRAWFORD Primary Contact Recreation Playters Lake CRAWFORD Primary Contact Recreation Basin: Smoky Hill/Saline Subbasin: Lower Smoky Hill (HUC 10260008) Herington City Park Lake DICKINSON Primary Contact Recreation Herington Reservoir DICKINSON Primary Contact Recreation Basin: Solomon Subbasin: Lower North Fork Solomon (HUC 10260012) Francis Wachs Wildlife Area Lakes SMITH Primary Contact Recreation Subbasin: Solomon River (HUC 10260015) Jewell County State Fishing Lake JEWELL Primary Contact Recreation Ottawa County State Fishing Lake OTTAWA Primary Contact Recreation Basin: Upper Arkansas Subbasin: Middle Arkansas-Lake McKinney (HUC 11030001) Lake McKinney KEARNY Primary Contact Recreation Subbasin: Arkansas-Dodge City (HUC 11030003) Lake Charles FORD Primary Contact Recreation Subbasin: Pawnee (HUC 11030005) Concannon State Fishing Lake FINNEY Primary Contact Recreation Finney County Game Refuge Lakes FINNEY Primary Contact Recreation Subbasin: Buckner (HUC 11030006) Ford County Lake FORD Primary Contact Recreation Hain State Fishing Lake FORD Primary Contact Recreation Subbasin: Upper Walnut Creek (HUC 11030007) Goodman State Fishing Lake NESS Primary Contact Recreation Subbasin: Lower Walnut Creek (HUC 11030008) Memorial Park Lake BARTON Primary Contact Recreation Stone Lake BARTON Primary Contact Recreation Basin: Verdigris Subbasin: Upper Verdigris (HUC 11070101) Quarry Lake WILSON Primary Contact Recreation Thayer New City Lake NEOSHO Primary Contact Recreation Subbasin: Middle Verdigris (HUC 11070103) La Claire Lake MONTGOMERY Primary Contact Recreation Pfister Park Lakes MONTGOMERY Primary Contact Recreation Subbasin: Caney (HUC 11070106) Caney City Lake CHAUTAUQUA Primary Contact Recreation Basin: Walnut Subbasin: Lower Walnut River (HUC 11030018) Butler County State Fishing Lake BUTLER Primary Contact Recreation Winfield Park Lagoon COWLEY Primary Contact Recreation Total = 100 (c) Water quality standard variances. [68 FR 40442, July 7, 2003, as amended at 80 FR 51050, Aug. 21, 2015] § 131.35 Colville Confederated Tribes Indian Reservation. The water quality standards applicable to the waters within the Colville Indian Reservation, located in the State of Washington. (a) Background. (2) The Colville Confederated Tribes have a primary interest in the protection, control, conservation, and utilization of the water resources of the Colville Indian Reservation. Water quality standards have been enacted into tribal law by the Colville Business Council of the Confederated Tribes of the Colville Reservation, as the Colville Water Quality Standards Act, CTC Title 33 (Resolution No. 1984-526 (August 6, 1984) as amended by Resolution No. 1985-20 (January 18, 1985)). (b) Territory covered. (c) Applicability, Administration and Amendment. (2) In conjunction with the issuance of section 402 or section 404 permits, the Regional Administrator may designate mixing zones in the waters of the United States on the reservation on a case-by-case basis. The size of such mixing zones and the in-zone water quality in such mixing zones shall be consistent with the applicable procedures and guidelines in EPA's Water Quality Standards Handbook and the Technical Support Document for Water Quality Based Toxics Control. (3) Amendments to the section at the request of the Tribe shall proceed in the following manner. (i) The requested amendment shall first be duly approved by the Confederated Tribes of the Colville Reservation (and so certified by the Tribes Legal Counsel) and submitted to the Regional Administrator. (ii) The requested amendment shall be reviewed by EPA (and by the State of Washington, if the action would affect a boundary water). (iii) If deemed in compliance with the Clean Water Act, EPA will propose and promulgate an appropriate change to this section. (4) Amendment of this section at EPA's initiative will follow consultation with the Tribe and other appropriate entities. Such amendments will then follow normal EPA rulemaking procedures. (5) All other applicable provisions of this part 131 shall apply on the Colville Confederated Tribes Reservation. Special attention should be paid to §§ 131.6, 131.10, 131.11 and 131.20 for any amendment to these standards to be initiated by the Tribe. (6) All numeric criteria contained in this section apply at all in-stream flow rates greater than or equal to the flow rate calculated as the minimum 7-consecutive day average flow with a recurrence frequency of once in ten years (7Q10); narrative criteria (§ 131.35(e)(3)) apply regardless of flow. The 7Q10 low flow shall be calculated using methods recommended by the U.S. Geological Survey. (d) Definitions. Acute toxicity (2) Background conditions (3) Ceremonial and Religious water use (4) Chronic toxicity i.e. (5) Council Tribal Council (6) Geometric mean nth n (7) Mean retention time (8) Mixing zone dilution zone (9) pH (10) Primary contact recreation (11) Regional Administrator (12) Reservation (13) Secondary contact recreation (14) Surface water (15) Temperature (16) Total dissolved solids (17) Toxicity (18) Tribe Tribes (19) Turbidity (20) Wildlife habitat (e) General considerations. (1) Classification boundaries. (2) Antidegradation policy. (i) Existing in-stream water uses and the level of water quality necessary to protect the existing uses shall be maintained and protected. (ii) Where the quality of the waters exceeds levels necessary to support propagation of fish, shellfish, and wildlife and recreation in and on the water, that quality shall be maintained and protected unless the Regional Administrator finds, after full satisfaction of the inter-governmental coordination and public participation provisions of the Tribes' continuing planning process, that allowing lower water quality is necessary to accommodate important economic or social development in the area in which the waters are located. In allowing such degradation or lower water quality, the Regional Administrator shall assure water quality adequate to protect existing uses fully. Further, the Regional Administrator shall assure that there shall be achieved the highest statutory and regulatory requirements for all new and existing point sources and all cost-effective and reasonable best management practices for nonpoint source control. (iii) Where high quality waters are identified as constituting an outstanding national or reservation resource, such as waters within areas designated as unique water quality management areas and waters otherwise of exceptional recreational or ecological significance, and are designated as special resource waters, that water quality shall be maintained and protected. (iv) In those cases where potential water quality impairment associated with a thermal discharge is involved, this antidegradation policy's implementing method shall be consistent with section 316 of the Clean Water Act. (3) Aesthetic qualities. (i) Settle to form objectionable deposits; (ii) Float as debris, scum, oil, or other matter forming nuisances; (iii) Produce objectionable color, odor, taste, or turbidity; (iv) Cause injury to, are toxic to, or produce adverse physiological responses in humans, animals, or plants; or (v) produce undesirable or nuisance aquatic life. (4) Analytical methods. (f) General water use and criteria classes. (1) Class I (Extraordinary) Designated uses. (A) Water supply (domestic, industrial, agricultural). (B) Stock watering. (C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, spawning, and harvesting. (D) Wildlife habitat. (E) Ceremonial and religious water use. (F) Recreation (primary contact recreation, sport fishing, boating and aesthetic enjoyment). (G) Commerce and navigation. (ii) Water quality criteria. (B) Dissolved oxygen—The dissolved oxygen shall exceed 9.5 mg/l. (C) Total dissolved gas—concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection. (D) Temperature—shall not exceed 16.0 degrees C due to human activities. Temperature increases shall not, at any time, exceed t = 23/(T + 5). ( 1 ( 2 ( 3 (E) pH shall be within the range of 6.5 to 8.5 with a human-caused variation of less than 0.2 units. (F) Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or have more than a 10 percent increase in turbidity when the background turbidity is more than 50 NTU. (G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of public health significance, or which may cause acute or chronic toxic conditions to the aquatic biota, or which may adversely affect designated water uses. (2) Class II (Excellent) Designated uses. (A) Water supply (domestic, industrial, agricultural). (B) Stock watering. (C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, spawning, and harvesting; crayfish rearing, spawning, and harvesting. (D) Wildlife habitat. (E) Ceremonial and religious water use. (F) Recreation (primary contact recreation, sport fishing, boating and aesthetic enjoyment). (G) Commerce and navigation. (ii) Water quality criteria. (B) Dissolved oxygen—The dissolved oxygen shall exceed 8.0 mg/l. (C) Total dissolved gas—concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection. (D) Temperature-shall not exceed 18.0 degrees C due to human activities. Temperature increases shall not, at any time, exceed t = 28/(T + 7). ( 1 ( 2 ( 3 (E) pH shall be within the range of 6.5 to 8.5 with a human-caused variation of less than 0.5 units. (F) Turbidity shall not exceed 5 NTU over background turbidity when the background turbidity is 50 NTU or less, or have more than a 10 percent increase in turbidity when the background turbidity is more than 50 NTU. (G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of public health significance, or which may cause acute or chronic toxic conditions to the aquatic biota, or which may adversely affect designated water uses. (3) Class III (Good) Designated uses. (A) Water supply (industrial, agricultural). (B) Stock watering. (C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, spawning, and harvesting; crayfish rearing, spawning, and harvesting. (D) Wildlife habitat. (E) Recreation (secondary contact recreation, sport fishing, boating and aesthetic enjoyment). (F) Commerce and navigation. (ii) Water quality criteria. (B) Dissolved oxygen. Early life stages 1 2 Other life stages 7 day mean 9.5 (6.5) 3 1 day minimum 4 8.0 (5.0) 6.5 1 2 3 4 (C) Total dissolved gas concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection. (D) Temperature shall not exceed 21.0 degrees C due to human activities. Temperature increases shall not, at any time, exceed t = 34/(T + 9). ( 1 ( 2 ( 3 (E) pH shall be within the range of 6.5 to 8.5 with a human-caused variation of less than 0.5 units. (F) Turbidity shall not exceed 10 NTU over background turbidity when the background turbidity is 50 NTU or less, or have more than a 20 percent increase in turbidity when the background turbidity is more than 50 NTU. (G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of public health significance, or which may cause acute or chronic toxic conditions to the aquatic biota, or which may adversely affect designated water uses. (4) Class IV (Fair) Designated uses. (A) Water supply (industrial). (B) Stock watering. (C) Fish (salmonid and other fish migration). (D) Recreation (secondary contact recreation, sport fishing, boating and aesthetic enjoyment). (E) Commerce and navigation. (ii) Water quality criteria. During periods of salmonid and other fish migration During all other time periods 30 day mean 6.5 5.5 7 day mean 1 1 7 day mean minimum 5.0 4.0 1 day minimum 2 4.0 3.0 1 2 (B) Total dissolved gas—concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection. (C) Temperature shall not exceed 22.0 degrees C due to human activities. Temperature increases shall not, at any time, exceed t = 20/(T + 2). ( 1 ( 2 (D) pH shall be within the range of 6.5 to 9.0 with a human-caused variation of less than 0.5 units. (E) Turbidity shall not exceed 10 NTU over background turbidity when the background turbidity is 50 NTU or less, or have more than a 20 percent increase in turbidity when the background turbidity is more than 50 NTU. (F) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those of public health significance, or which may cause acute or chronic toxic conditions to the aquatic biota, or which may adversely affect designated water uses. (5) Lake Class Designated uses. (A) Water supply (domestic, industrial, agricultural). (B) Stock watering. (C) Fish and shellfish: Salmonid migration, rearing, spawning, and harvesting; other fish migration, rearing, spawning, and harvesting; crayfish rearing, spawning, and harvesting. (D) Wildlife habitat. (E) Ceremonial and religious water use. (F) Recreation (primary contact recreation, sport fishing, boating and aesthetic enjoyment). (G) Commerce and navigation. (ii) Water quality criteria. (B) Dissolved oxygen—no measurable decrease from natural conditions. (C) Total dissolved gas concentrations shall not exceed 110 percent of the saturation value for gases at the existing atmospheric and hydrostatic pressures at any point of sample collection. (D) Temperature—no measurable change from natural conditions. (E) pH—no measurable change from natural conditions. (F) Turbidity shall not exceed 5 NTU over natural conditions. (G) Toxic, radioactive, nonconventional, or deleterious material concentrations shall be less than those which may affect public health, the natural aquatic environment, or the desirability of the water for any use. (6) Special Resource Water Class (SRW) General characteristics. (ii) Designated uses. (A) Wildlife habitat. (B) Natural foodchain maintenance. (iii) Water quality criteria. (A) Enterococci bacteria densities shall not exceed natural conditions. (B) Dissolved oxygen—shall not show any measurable decrease from natural conditions. (C) Total dissolved gas shall not vary from natural conditions. (D) Temperature—shall not show any measurable change from natural conditions. (E) pH shall not show any measurable change from natural conditions. (F) Settleable solids shall not show any change from natural conditions. (G) Turbidity shall not exceed 5 NTU over natural conditions. (H) Toxic, radioactive, or deleterious material concentrations shall not exceed those found under natural conditions. (g) General classifications. (1) All surface waters that are tributaries to Class I waters are classified Class I, unless otherwise classified. (2) Except for those specifically classified otherwise, all lakes with existing average concentrations less than 2000 mg/L TDS and their feeder streams on the Colville Indian Reservation are classified as Lake Class and Class I, respectively. (3) All lakes on the Colville Indian Reservation with existing average concentrations of TDS equal to or exceeding 2000 mg/L and their feeder streams are classified as Lake Class and Class I respectively unless specifically classified otherwise. (4) All reservoirs with a mean detention time of greater than 15 days are classified Lake Class. (5) All reservoirs with a mean detention time of 15 days or less are classified the same as the river section in which they are located. (6) All reservoirs established on pre-existing lakes are classified as Lake Class. (7) All wetlands are assigned to the Special Resource Water Class. (8) All other waters not specifically assigned to a classification of the reservation are classified as Class II. (h) Specific classifications. (1) Streams: Alice Creek Class III Anderson Creek Class III Armstrong Creek Class III Barnaby Creek Class II Bear Creek Class III Beaver Dam Creek Class II Bridge Creek Class II Brush Creek Class III Buckhorn Creek Class III Cache Creek Class III Canteen Creek Class I Capoose Creek Class III Cobbs Creek Class III Columbia River from Chief Joseph Dam to Wells Dam Columbia River from northern Reservation boundary to Grand Coulee Dam (Roosevelt Lake) Columbia River from Grand Coulee Dam to Chief Joseph Dam Cook Creek Class I Cooper Creek Class III Cornstalk Creek Class III Cougar Creek Class I Coyote Creek Class II Deerhorn Creek Class III Dick Creek Class III Dry Creek Class I Empire Creek Class III Faye Creek Class I Forty Mile Creek Class III Gibson Creek Class I Gold Creek Class II Granite Creek Class II Grizzly Creek Class III Haley Creek Class III Hall Creek Class II Hall Creek, West Fork Class I Iron Creek Class III Jack Creek Class III Jerred Creek Class I Joe Moses Creek Class III John Tom Creek Class III Jones Creek Class I Kartar Creek Class III Kincaid Creek Class III King Creek Class III Klondyke Creek Class I Lime Creek Class III Little Jim Creek Class III Little Nespelem Class II Louie Creek Class III Lynx Creek Class II Manila Creek Class III McAllister Creek Class III Meadow Creek Class III Mill Creek Class II Mission Creek Class III Nespelem River Class II Nez Perce Creek Class III Nine Mile Creek Class II Nineteen Mile Creek Class III No Name Creek Class II North Nanamkin Creek Class III North Star Creek Class III Okanogan River from Reservation north boundary to Columbia River Class II Olds Creek Class I Omak Creek Class II Onion Creek Class II Parmenter Creek Class III Peel Creek Class III Peter Dan Creek Class III Rock Creek Class I San Poil River Class I Sanpoil, River West Fork Class II Seventeen Mile Creek Class III Silver Creek Class III Sitdown Creek Class III Six Mile Creek Class III South Nanamkin Creek Class III Spring Creek Class III Stapaloop Creek Class III Stepstone Creek Class III Stranger Creek Class II Strawberry Creek Class III Swimptkin Creek Class III Three Forks Creek Class I Three Mile Creek Class III Thirteen Mile Creek Class II Thirty Mile Creek Class II Trail Creek Class III Twentyfive Mile Creek Class III Twentyone Mile Creek Class III Twentythree Mile Creek Class III Wannacot Creek Class III Wells Creek Class I Whitelaw Creek Class III Wilmont Creek Class II (2) Lakes: Apex Lake LC Big Goose Lake LC Bourgeau Lake LC Buffalo Lake LC Cody Lake LC Crawfish Lakes LC Camille Lake LC Elbow Lake LC Fish Lake LC Gold Lake LC Great Western Lake LC Johnson Lake LC LaFleur Lake LC Little Goose Lake LC Little Owhi Lake LC McGinnis Lake LC Nicholas Lake LC Omak Lake SRW Owhi Lake SRW Penley Lake SRW Rebecca Lake LC Round Lake LC Simpson Lake LC Soap Lake LC Sugar Lake LC Summit Lake LC Twin Lakes SRW [54 FR 28625, July 6, 1989] § 131.36 Toxics criteria for those states not complying with Clean Water Act section 303(c)(2)(B). (a) Scope. (b)(1) EPA's Section 304(a) criteria for Priority Toxic Pollutants. A B C D −6 (#) Compound CAS Number Criterion d Criterion d Criterion d Criterion d Water & Organisms 1 Antimony 7440360 14 a 4300 a 2 Arsenic 7440382 360 m 190 m 69 m 36 m 0.018 abc 0.14 abc 3 Beryllium 7440417 n n 4 Cadmium 7440439 3.7 e 1.0 e 42 m 9.3 m n n 5a Chromium (III) 16065831 550 e 180 e n n b Chromium (VI) 18540299 15 m 10 m 1100 m 50 m n n 6 Copper 7440508 17 e 11 e 2.4 m 2.4 m 7 Lead 7439921 65 e 2.5 e 210 m 8.1 m n n 8 Mercury 7439976 2.1 m 0.012 ip 1.8 m 0.025 ip 0.14 0.15 9 Nickel 7440020 1400 e 160 e 74 m 8.2 m 610 a 4600 a 10 Selenium 7782492 20 p 5 p 290 m 71 m n n 11 Silver 7440224 3.4 e 1.9 m 12 Thallium 7440280 1.7 a 6.3 a 13 Zinc 7440666 110 e 100 e 90 m 81 m 14 Cyanide 57125 22 5.2 1 1 700 a 220000 aj 15 Asbestos 1332214 7,000,000 fibers/L k 16 2,3,7,8-TCDD (Dioxin) 1746016 0.000000013 c 0.000000014 c 17 Acrolein 107028 320 780 18 Acrylonitrile 107131 0.059 ac 0.66 ac 19 Benzene 71432 1.2 ac 71 ac 20 Bromoform 75252 4.3 ac 360 ac 21 Carbon Tetrachloride 56235 0.25 ac 4.4 ac 22 Chlorobenzene 108907 680 a 21000 aj 23 Chlorodibromomethane 124481 0.41 ac 34 ac 24 Chloroethane 75003 25 2-Chloroethylvinyl Ether 110758 26 Chloroform 67663 5.7 ac 470 ac 27 Dichlorobromomethane 75274 0.27 ac 22 ac 28 1,1-Dichloroethane 75343 29 1,2-Dichloroethane 107062 0.38 ac 99 ac 30 1,1-Dichloroethylene 75354 0.057 ac 3.2 ac 31 1,2-Dichloropropane 78875 32 1,3-Dichloropropylene 542756 10 a 1700 a 33 Ethylbenzene 100414 3100 a 29000 a 34 Methyl Bromide 74839 48 a 4000 a 35 Methyl Chloride 74873 n n 36 Methylene Chloride 75092 4.7 ac 1600 ac 37 1,1,2,2-Tetrachloroethane 79345 0.17 ac 11 ac 38 Tetrachloroethylene 127184 0.8 c 8.85 c 39 Toluene 108883 6800 a 200000 a 40 1,2-Trans-Dichloroethylene 156605 41 1,1,1-Trichloroethane 71556 n n 42 1,1,2-Trichloroethane 79005 0.60 ac 42 ac 43 Trichloroethylene 79016 2.7 c 81 c 44 Vinyl Chloride 75014 2 c 525 c 45 2-Chlorophenol 95578 46 2,4-Dichlorophenol 120832 93 a 790 aj 47 2,4-Dimethylphenol 105679 48 2-Methyl-4,6-Dinitrophenol 534521 13.4 765 49 2,4-Dinitrophenol 51285 70 a 14000 a 50 2-Nitrophenol 88755 51 4-Nitrophenol 100027 52 3-Methyl-4-Chlorophenol 59507 53 Pentachlorophenol 87865 20 f 13 f 13 7.9 0.28 ac 8.2 acj 54 Phenol 108952 21000 a 4600000 aj 55 2,4,6-Trichlorophenol 88062 2.1 ac 6.5 ac 56 Acenaphthene 83329 57 Acenaphthylene 208968 58 Anthracene 120127 9600 a 110000 a 59 Benzidine 92875 0.00012 ac 0.00054 ac 60 Benzo(a)Anthracene 56553 0.0028 c 0.031 c 61 Benzo(a)Pyrene 50328 0.0028 c 0.031 c 62 Benzo(b)Fluoranthene 205992 0.0028 c 0.031 c 63 Benzo(ghi)Perylene 191242 64 Benzo(k)Fluoranthene 207089 0.0028 c 0.031 c 65 Bis(2-Chloroethoxy)Methane 111911 66 Bis(2-Chloroethyl)Ether 111444 0.031 ac 1.4 ac 67 Bis(2-Chloroisopropyl)Ether 108601 1400 a 170000 a 68 Bis(2-Ethylhexyl)Phthalate 117817 1.8 ac 5.9 ac 69 4-Bromophenyl Phenyl Ether 101553 70 Butylbenzyl Phthalate 85687 71 2-Chloronaphthalene 91587 72 4-Chlorophenyl Phenyl Ether 7005723 73 Chrysene 218019 0.0028 c 0.031 c 74 Dibenzo(ah)Anthracene 53703 0.0028 c 0.031 c 75 1,2-Dichlorobenzene 95501 2700 a 17000 a 76 1,3-Dichlorobenzene 541731 400 2600 77 1,4-Dichlorobenzene 106467 400 2600 78 3,3′-Dichlorobenzidine 91941 0.04 ac 0.077 ac 79 Diethyl Phthalate 84662 23000 a 120000 a 80 Dimethyl Phthalate 131113 313000 2900000 81 Di-n-Butyl Phthalate 84742 2700 a 12000 a 82 2,4-Dinitrotoluene 121142 0.11 c 9.1 c 83 2,6-Dinitrotoluene 606202 84 Di-n-Octyl Phthalate 117840 85 1,2-Diphenylhydrazine 122667 0.040 ac 0.54 ac 86 Fluoranthene 206440 300 a 370 a 87 Fluorene 86737 1300 a 14000 a 88 Hexachlorobenzene 118741 0.00075 ac 0.00077 ac 89 Hexachlorobutadiene 87683 0.44 ac 50 ac 90 Hexachlorocyclopentadiene 77474 240 a 17000 aj 91 Hexachloroethane 67721 1.9 ac 8.9 ac 92 Indeno(1,2,3-cd)Pyrene 193395 0.0028 c 0.031 c 93 Isophorone 78591 8.4 ac 600 ac 94 Naphthalene 91203 95 Nitrobenzene 98953 17 a 1900 aj 96 N-Nitrosodimethylamine 62759 0.00069 ac 8.1 ac 97 N-Nitrosodi-n-Propylamine 621647 98 N-Nitrosodiphenylamine 86306 5.0 ac 16 ac 99 Phenanthrene 85018 100 Pyrene 129000 960 a 11000 a 101 1,2,4-Trichlorobenzene 120821 102 Aldrin 309002 3 g 1.3 g 0.00013 ac 0.00014 ac 103 alpha-BHC 319846 0.0039 ac 0.013 ac 104 beta-BHC 319857 0.014 ac 0.046 ac 105 gamma-BHC 58899 2 g 0.08 g 0.16 g 0.019 c 0.063 c 106 delta-BHC 319868 107 Chlordane 57749 2.4 g 0.0043 g 0.09 g 0.004 g 0.00057 ac 0.00059 ac 108 4,4′-DDT 50293 1.1 g 0.001 g 0.13 g 0.001 g 0.00059 ac 0.00059 ac 109 4,4′-DDE 72559 0.00059 ac 0.00059 ac 110 4,4′-DDD 72548 0.00083 ac 0.00084 ac 111 Dieldrin 60571 2.5 g 0.0019 g 0.71 g 0.0019 g 0.00014 ac 0.00014 ac 112 alpha-Endosulfan 959988 0.22 g 0.056 g 0.034 g 0.0087 g 0.93 a 2.0 a 113 beta-Endosulfan 33213659 0.22 g 0.056 g 0.034 g 0.0087 g 0.93 a 2.0 a 114 Endosulfan Sulfate 1031078 0.93 a 2.0 a 115 Endrin 72208 0.18 g 0.0023 g 0.037 g 0.0023 g 0.76 a 0.81 aj 116 Endrin Aldehyde 7421934 0.76 a 0.81 aj 117 Heptachlor 76448 0.52 g 0.0038 g 0.053 g 0.0036 g 0.00021 ac 0.00021 ac 118 Heptachlor Epoxide 1024573 0.52 g 0.0038 g 0.053 g 0.0036 g 0.00010 ac 0.00011 ac 119 PCB-1242 53469219 0.014 g 0.03 g 120 PCB-1254 11097691 0.014 g 0.03 g 121 PCB-1221 11104282 0.014 g 0.03 g 122 PCB-1232 11141165 0.014 g 0.03 g 123 PCB-1248 12672296 0.014 g 0.03 g 124 PCB-1260 11096825 0.014 g 0.03 g 125a PCB-1016 12674112 0.014 g 0.03 g 125b Polychlorinated biphenyls 0.00017 q 0.00017 q 126 Toxaphene 8001352 0.73 0.0002 0.21 0.0002 0.00073 ac 0.00075 ac Total Number of Criteria (h) = 24 29 23 27 85 84 Footnotes a. Criteria revised to reflect current agency q 1 b. The criteria refers to the inorganic form only. c. Criteria in the matrix based on carcinogenicity (10 −6 −5 d. Criteria Maximum Concentration (CMC) = the highest concentration of a pollutant to which aquatic life can be exposed for a short period of time (1-hour average) without deleterious effects. Criteria Continuous Concentration (CCC) = the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time (4 days) without deleterious effects. µg/L = micrograms per liter. e. Freshwater aquatic life criteria for these metals are expressed as a function of total hardness (mg/L as CaCO 3 f. Freshwater aquatic life criteria for pentachlorophenol are expressed as a function of pH, and are calculated as follows. Values displayed above in the matrix correspond to a pH of 7.8. CMC = exp(1.005(pH)−4.830) CCC = exp(1.005(pH)−5.290) g. Aquatic life criteria for these compounds were issued in 1980 utilizing the 1980 Guidelines for criteria development. The acute values shown are final acute values (FAV) which by the 1980 Guidelines are instantaneous values as contrasted with a CMC which is a one-hour average. h. These totals simply sum the criteria in each column. For aquatic life, there are 31 priority toxic pollutants with some type of freshwater or saltwater, acute or chronic criteria. For human health, there are 85 priority toxic pollutants with either “water + fish” or “fish only” criteria. Note that these totals count chromium as one pollutant even though EPA has developed criteria based on two valence states. In the matrix, EPA has assigned numbers 5a and 5b to the criteria for chromium to reflect the fact that the list of 126 priority toxic pollutants includes only a single listing for chromium. i. If the CCC for total mercury exceeds 0.012 µg/l more than once in a 3-year period in the ambient water, the edible portion of aquatic species of concern must be analyzed to determine whether the concentration of methyl mercury exceeds the FDA action level (1.0 mg/kg). If the FDA action level is exceeded, the State must notify the appropriate EPA Regional Administrator, initiate a revision of its mercury criterion in its water quality standards so as to protect designated uses, and take other appropriate action such as issuance of a fish consumption advisory for the affected area. j. No criteria for protection of human health from consumption of aquatic organisms (excluding water) was presented in the 1980 criteria document or in the 1986 Quality Criteria for Water. Nevertheless, sufficient information was presented in the 1980 document to allow a calculation of a criterion, even though the results of such a calculation were not shown in the document. k. The criterion for asbestos is the MCL (56 FR 3526, January 30, 1991). l. [Reserved: This letter not used as a footnote.] m. Criteria for these metals are expressed as a function of the water effect ratio, WER, as defined in 40 CFR 131.36(c). CMC = column B1 or C1 value × WER CCC = column B2 or C2 value × WER n. EPA is not promulgating human health criteria for this contaminant. However, permit authorities should address this contaminant in NPDES permit actions using the State's existing narrative criteria for toxics. o. [Reserved: This letter not used as a footnote.] p. Criterion expressed as total recoverable. q. This criterion applies to total PCBs ( e.g., General Notes 1. This chart lists all of EPA's priority toxic pollutants whether or not criteria recommendations are available. Blank spaces indicate the absence of criteria recommendations. Because of variations in chemical nomenclature systems, this listing of toxic pollutants does not duplicate the listing in Appendix A of 40 CFR Part 423. EPA has added the Chemical Abstracts Service (CAS) registry numbers, which provide a unique identification for each chemical. 2. The following chemicals have organoleptic based criteria recommendations that are not included on this chart (for reasons which are discussed in the preamble): copper, zinc, chlorobenzene, 2-chlorophenol, 2,4-dichlorophenol, acenaphthene, 2,4-dimethylphenol, 3-methyl-4-chlorophenol, hexachlorocyclopentadiene, pentachlorophenol, phenol. 3. For purposes of this rulemaking, freshwater criteria and saltwater criteria apply as specified in 40 CFR 131.36(c). Note to paragraph ( b On April 14, 1995, the Environmental Protection Agency issued a stay of certain criteria in paragraph (b)(1) of this section as follows: the criteria in columns B and C for arsenic, cadmium, chromium (VI), copper, lead, nickel, silver, and zinc; the criteria in B1 and C1 for mercury; the criteria in column B for chromium (III); and the criteria in column C for selenium. The stay remains in effect until further notice. (2) Factors for Calculating Hardness-Dependent, Freshwater Metals Criteria CMC = WER exp { m A A CCC = WER exp { m C C Final CMC and CCC values should be rounded to two significant figures. Metal m A b A m C b C Freshwater conversion factors Acute Chronic Cadmium 1.128 -3.828 0.7852 -3.490 a a Chromium (III) 0.8190 3.688 0.8190 1.561 0.316 0.860 Copper 0.9422 -1.464 0.8545 -1.465 0.960 0.960 Lead 1.273 -1.460 1.273 -4.705 a a Nickel 0.8460 3.3612 0.8460 1.1645 0.998 0.997 Silver 1.72 -6.52 b b 0.85 b Zinc 0.8473 0.8604 0.8473 0.7614 0.978 0.986 Note to table: The term “exp” represents the base e exponential function. Footnotes to table: a Cadmium Acute: CF = 1.136672—[(ln hardness)(0.041838)] Chronic: CF = 1.101672—[(ln hardness)(0.041838)] Lead (Acute and Chronic): CF = 1.46203—[(ln hardness)(0.145712)] b (c) Applicability. (2) The criteria established in this section are subject to the State's general rules of applicability in the same way and to the same extent as are the other numeric toxics criteria when applied to the same use classifications including mixing zones, and low flow values below which numeric standards can be exceeded in flowing fresh waters. (i) For all waters with mixing zone regulations or implementation procedures, the criteria apply at the appropriate locations within or at the boundary of the mixing zones; otherwise the criteria apply throughout the waterbody including at the end of any discharge pipe, canal or other discharge point. (ii) A State shall not use a low flow value below which numeric standards can be exceeded that is less stringent than the following for waters suitable for the establishment of low flow return frequencies ( i.e. Aquatic Life Acute criteria (CMC) 1 Q 10 or 1 B 3 Chronic criteria (CCC) 7 Q 10 or 4 B 3 Human Health Non-carcinogens 30 Q 5 Carcinogens Harmonic mean flow Where: CMC—criteria maximum concentration—the water quality criteria to protect against acute effects in aquatic life and is the highest instream concentration of a priority toxic pollutant consisting of a one-hour average not to be exceeded more than once every three years on the average; CCC—criteria continuous concentration—the water quality criteria to protect against chronic effects in aquatic life is the highest instream concentration of a priority toxic pollutant consisting of a 4-day average not to be exceeded more than once every three years on the average; 1 Q 10 is the lowest one day flow with an average recurrence frequency of once in 10 years determined hydrologically; 1 B 3 is biologically based and indicates an allowable exceedence of once every 3 years. It is determined by EPA's computerized method (DFLOW model); 7 Q 10 is the lowest average 7 consecutive day low flow with an average recurrence frequency of once in 10 years determined hydrologically; 4 B 3 is biologically based and indicates an allowable exceedence for 4 consecutive days once every 3 years. It is determined by EPA's computerized method (DFLOW model); 30 Q 5 is the lowest average 30 consecutive day low flow with an average recurrence frequency of once in 5 years determined hydrologically; and the harmonic mean flow is a long term mean flow value calculated by dividing the number of daily flows analyzed by the sum of the reciprocals of those daily flows. (iii) If a State does not have such a low flow value for numeric standards compliance, then none shall apply and the criteria included in paragraph (d) of this section herein apply at all flows. (3) The aquatic life criteria in the matrix in paragraph (b) of this section apply as follows: (i) For waters in which the salinity is equal to or less than 1 part per thousand 95% or more of the time, the applicable criteria are the freshwater criteria in Column B; (ii) For waters in which the salinity is equal to or greater than 10 parts per thousand 95% or more of the time, the applicable criteria are the saltwater criteria in Column C; and (iii) For waters in which the salinity is between 1 and 10 parts per thousand as defined in paragraphs (c)(3) (i) and (ii) of this section, the applicable criteria are the more stringent of the freshwater or saltwater criteria. However, the Regional Administrator may approve the use of the alternative freshwater or saltwater criteria if scientifically defensible information and data demonstrate that on a site-specific basis the biology of the waterbody is dominated by freshwater aquatic life and that freshwater criteria are more appropriate; or conversely, the biology of the waterbody is dominated by saltwater aquatic life and that saltwater criteria are more appropriate. (4) Application of metals criteria. (ii) The hardness values used shall be consistent with the design discharge conditions established in paragraph (c)(2) of this section for flows and mixing zones. (iii) Except where otherwise noted, the criteria for metals (compounds #2, #4-# 11, and #13, in paragraph (b) of this section) are expressed as dissolved metal. For purposes of calculating aquatic life criteria for metals from the equations in footnote m. in the criteria matrix in paragraph (b)(1) of this section and the equations in paragraphs (b)(2) of this section, the water-effect ratio is computed as a specific pollutant's acute or chronic toxicity values measured in water from the site covered by the standard, divided by the respective acute or chronic toxicity value in laboratory dilution water. (d) Criteria for Specific Jurisdictions Rhode Island, EPA Region 1. 6.21 Freshwater 6.22 Saltwater: Class A Class SA Class B Class SB Class C Class SC (ii) The following criteria from the matrix in paragraph (b)(1) of this section apply to the use classifications identified in paragraph (d)(1)(i) of this section: Use classification Applicable criteria Class A These classifications are assigned the criteria in Column D1—#2, 68 Class B waters where water supply use is not designated Each of these classifications is assigned the criteria in: Column D2—#2, 68 (iii) The human health criteria shall be applied at the 10 −5 (2) Vermont, EPA Region 1. Class A Class B Class C (ii) The following criteria from the matrix in paragraph (b)(1) of this section apply to the use classifications identified in paragraph (d)(2)(i) of this section: Use classification Applicable criteria 1. Classes A1, A2, B1, B2, B3 These classification are assigned the criterion in: (iii) The human health criteria shall be applied at the State-proposed 10 −6 (3)-(4) Reserved] (5) District of Columbia, EPA Region 3. 1101.2 Class C waters (ii) The following criteria from the matrix in paragraph (b)(1) of this section apply to the use classification identified in paragraph (d)(5)(i) of this section: Use classification Applicable criteria 1. Class C This classification is assigned the additional criteria in: (iii) The human health criteria shall be applied at the State-adopted 10 −6 (6) Florida, EPA Region 4. i.e. Class I Class II Class III (ii) The following criteria from the matrix paragraph (b)(1) of this section apply to the use classifications identified in paragraph (d)(6)(i) of this section: Use classification Applicable criteria Class I This classification is assigned the criteria in: Column D1—#16 Class II This classification is assigned the criteria in: Column D2—#16 Class III (freshwater) This classification is assigned the criteria in: Column D2—#16 (iii) The human health criteria shall be applied at the State-adopted 10 −6 (7)-(8) [Reserved] (9) Kansas, EPA Region 7. Section (2)(A)—Special Aquatic Life Use Waters Section (2)(B)—Expected Aquatic Life Use Waters Section (2)(C)—Restricted Aquatic Life Use Waters Section (3)—Domestic Water Supply. Section (4)—Food Procurement Use. (ii) The following criteria from the matrix in paragraph (b)(1) of this section apply to the use classifications identified in paragraph (d)(9)(i) of this section: Use classification Applicable criteria 1. Sections (2)(A), (2)(B), (2)(C), (4) These classifications are each assigned criteria as follows: i. Column B1, #2. ii. Column D2, #12, 21, 29, 39, 46, 68, 79, 81, 86, 93, 104, 114, 118. 2. Section (3) This classification is assigned all criteria in: Column D1, all except #1, 9, 12, 14, 15, 17, 22, 33, 36, 39, 44, 75, 77, 79, 90, 112, 113, and 115. (iii) The human health criteria shall be applied at the State-adopted 10 −6 (10) California, EPA Region 9. (ii) The following criteria from the matrix in paragraph (b)(1) of this section apply to the water and use classifications defined in paragraph (d)(10)(i) of this section and identified below: Water and use classification Applicable criteria Waters of the Sacramento-San Joaquin Delta within Regional Water Board 5 Column C1—polluntant 14. Waters of the State defined as bays or estuaries except the Sacramento-San Joaquin Delta and San Francisco Bay These waters are assigned the criteria in: Column B1—pollutants 5a and 14 Column B2—pollutants 5a and 14 Column C1—pollutant 14 Column C2—pollutant 14 Column D2—pollutants 1, 12, 17, 18, 21, 22, 29, 30, 32, 33, 37, 38, 42-44, 46, 48, 49, 54, 59, 66, 67, 68, 78-82, 85, 89, 90, 91, 93, 95, 96, 98 Waters of the Sacramento—San Joaquin Delta and waters of the State defined as inland ( i.e. These waters are assigned the criteria in: Waters of the State defined as inland without an MUN use designation These waters are assigned the criteria in: Column B1—pollutants 5a and 14 Column B2—pollutants 5a and 14 Column D2—pollutants 1, 12, 17, 18, 21, 22, 29, 30, 32, 33, 37, 38, 42-44, 46, 48, 49, 54, 59, 66, 67, 68, 78-82, 85, 89, 90, 91, 93, 95, 96, 98 Waters of the San Joaquin River from the mouth of the Merced River to Vernalis In addition to the criteria assigned to these waters elsewhere in this rule, these waters are assigned the criteria in: Column B2—pollutant 10 Waters of Salt Slough, Mud Slough (north) and the San Joaquin River, Sack Dam to the mouth of the Merced River In addition to the criteria assigned to these waters elsewhere in this rule, these waters are assigned the criteria in: Column B1—pollutant 10 Column B2—pollutant 10 Waters of San Francisco Bay upstream to and including Suisun Bay and the Sacramento-San Joaquin Delta These waters are assigned the criteria in: All inland waters of the United States or enclosed bays and estuaries that are waters of the United States that include an MUN use designation and that the State has either excluded or partially excluded from coverage under its Water Quality Control Plan for Inland Surface Waters of California, Tables 1 and 2, or its Water Quality Control Plan for Enclosed Bays and Estuaries of California, Tables 1 and 2, or has deferred applicability of those tables. (Category (a), (b), and (c) waters described on page 6 of Water Quality Control Plan for Inland Surface Waters of California or page 6 of its Water Quality Control Plan for Enclosed Bays and Estuaries of California.) These waters are assigned the criteria for pollutants for which the State does not apply Table 1 or 2 standards. These criteria are: All inland waters of the United States that do not include an MUN use designation and that the State has either excluded or partially excluded from coverage under its Water Quality Control Plan for Inland Surface Waters of California, Tables 1 and 2, or has deferred applicability of these tables. (Category (a), (b), and (c) waters described on page 6 of Water Quality Control Plan for Inland Surface Waters of California.) These waters are assigned the criteria for pollutants for which the State does not apply Table 1 or 2 standards. These criteria are: All enclosed bays and estuaries that are waters of the United States that do not include an MUN designation and that the State has either excluded or partially excluded from coverage under its Water Quality Control Plan for Inland Surface Waters of California, Tables 1 and 2, or its Water Quality Control Plan for Enclosed Bays and Estuaries of California, Tables 1 and 2, or has deferred applicability of those tables. (Category (a), (b), and (c) waters described on page 6 of Water Quality Control Plan for Inland Surface Waters of California or page 6 of its Water Quality Control Plan for Enclosed Bays and Estuaries of California.) These waters are assigned the criteria for pollutants for which the State does not apply Table 1 or 2 standards. These criteria are: *The fresh water selenium criteria are included for the San Francisco Bay estuary because high levels of bioaccumulation of selenium in the estuary indicate that the salt water criteria are underprotective for San Francisco Bay. (iii) The human health criteria shall be applied at the State-adopted 10 −6 (11) Nevada, EPA Region 9. (ii) The following criteria from matrix in paragraph (b)(1) of this section apply to the waters defined in paragraph (d)(11)(i) of this section and identified below: Water and use classification Applicable criteria Waters that the State has included in NAC 445.1339 where Municipal or domestic supply is a designated use These waters are assigned the criteria in: Waters that the State has included in NAC 445.1339 where Municipal or domestic supply is not a designated use These waters are assigned the criteria in: (iii) The human health criteria shall be applied at the 10 −5 (12) Alaska, EPA Region 10. i.e. 70.020.(1) (A) Fresh Water 70.020.(1) (A) Water Supply (i) Drinking, culinary, and food processing, (iii) Aquaculture; 70.020.(1) (B) Water Recreation (i) Contact recreation, (ii) Secondary recreation; 70.020.(1) (C) Growth and propagation of fish, shellfish, other aquatic life, and wildlife 70.020.(2) (A) Marine Water 70.020.(2) (A) Water Supply (i) Aquaculture, 70.020.(2) (B) Water Recreation (i) contact recreation, (ii) secondary recreation; 70.020.(2) (C) Growth and propagation of fish, shellfish, other aquatic life, and wildlife; 70.020.(2) (D) Harvesting for consumption of raw mollusks or other raw aquatic life. (ii) The following criteria from the matrix in paragraph (b)(1) of this section apply to the use classifications identified in paragraph (d)(12)(i) of this section: Use classification Applicable criteria (1)(A)(i) Column D1—#s 16, 18-21, 23, 26, 27, 29, 30, 32, 37, 38, 42-44, 53, 55, 59-62, 64, 66, 68, 73, 74, 78, 82, 85, 88, 89, 91-93, 96, 98, 102-105, 107-111, 117-126. (1)(A)(iii) Column D2—#s 14, 16, 18-21, 22, 23, 26, 27, 29, 30, 32, 37, 38, 42-44, 46, 53, 54, 55, 59-62, 64, 66, 68, 73, 74, 78, 82, 85, 88-93, 95, 96, 98, 102-105, 107-111, 115-126. (1)(B)(i), (1)(B)(ii), (1)(C) Column D2—#s 14, 16, 18-21, 22, 23, 26, 27, 29, 30, 32, 37, 38, 42-44, 46, 53, 54, 55, 59-62, 64, 66, 68, 73, 74, 78, 82, 85, 88-93, 95, 96, 98, 102-105, 107-111, 115-126. (2)(A)(i), (2)(B)(i), and (2)(B)ii, (2)(C), (2)(D) Column D2—#s 14, 16, 18-21, 22, 23, 26, 27, 29, 30, 32, 37, 38, 42-44, 46, 53, 54, 55, 59-62, 64, 66, 68, 73, 74, 78, 82, 85, 88-93, 95, 96, 98, 102-105, 107-111, 115-126. (iii) The human health criteria shall be applied at the State-proposed risk level of 10 −5. (13) [Reserved] [57 FR 60910, Dec. 22, 1992] Editorial Note: For Federal Register www.govinfo.gov. § 131.37 California. (a) Additional criteria. (1) Estuarine habitat criteria. General rule. Number of days required in Month X = Total number of days in Month × * (1 − 1/(1 + e K where K = A + (B*natural logarithm of the previous month's 8-River Index); A and B are determined by reference to Table 1 for the Roe Island and Chipps Island locations; x is the calendar month in the February 1 to June 30 period; and e is the base of the natural (or Napierian) logarithm. Where the number of days computed in this equation in paragraph (a)(1)(i)(A) of this section shall be rounded to the nearest whole number of days. When the previous month's 8-River Index is less than 500,000 acre-feet, the number of days required for the current month shall be zero. Table 1. Constants applicable to each of the monthly equations to determine monthly requirements described. Month X Chipps Island Roe Island (if triggered) A B A B Feb − 1 − 1 −14.36 + 2.068 Mar −105.16 + 15.943 −20.79 + 2.741 Apr −47.17 + 6.441 −28.73 + 3.783 May −94.93 + 13.662 −54.22 + 6.571 June −81.00 + 9.961 −92.584 + 10.699 1 (B) The Roe Island criteria apply at the salinity measuring station maintained by the U.S. Bureau of Reclamation at Port Chicago (km 64). The Chipps Island criteria apply at the Mallard Slough Monitoring Site, Station D-10 (RKI RSAC-075) maintained by the California Department of Water Resources. The Confluence criteria apply at the Collinsville Continuous Monitoring Station C-2 (RKI RSAC-081) maintained by the California Department of Water Resources. (ii) Exception. (2) Fish migration criteria General rule Sacramento River. At temperatures less than below 61 °F: SRFMC = 1.35 At temperatures between 61 °F and 72 °F: SRFMC = 6.96-.092 * Fahrenheit temperature At temperatures greater than 72 °F: SRFMC = 0.34 where SRFMC is the Sacramento River Fish Migration criteria value. Temperature shall be the water temperature at release of tagged salmon smolts into the Sacramento River at Miller Park. (B) San Joaquin River. For years in which the SJVIndex is >2.5: SJFMC = (−0.012) + 0.184*SJVIndex In other years: SJFMC = 0.205 + 0.0975*SJVIndex where SJFMC is the San Joaquin River Fish Migration criteria value, and SJVIndex is the San Joaquin Valley Index in million acre feet (MAF) (ii) Computing fish migration criteria values for Sacramento River. (A) The Chipps Island smolt survival index is calculated as: SSI = R ÷ MT(0.007692) where R = number of recaptures of tagged fish M = number of marked (tagged) fish released T = proportion of time sampled vs total time tagged fish were passing the site (i.e. time between first and last tagged fish recovery) Where the value 0.007692 is the proportion of the channel width fished by the trawl, and is calculated as trawl width/channel width. (B) Recoveries of tagged fish from the ocean salmon fishery two to four years after release are also used to calculate a survival index for each release. Smolt survival indices from ocean recoveries are calculated as: OSI = R 1 1 2 2 where R 1 M 1 R 2 M 2 ( 1 ( 2 (iii) Computing fish migration criteria values for San Joaquin River. (A) Fish for release are to be tagged at the hatchery with coded-wire tags, and fin clipped. Approximately 50,000 to 100,000 fish of smolt size (size greater than 75 mm) are released for each survival index estimate, depending on expected mortality. As a control for the ocean recovery survival index, one or two groups per season are released at Benicia or Pt. Chicago. From each upstream release of tagged fish, fish are to be caught over a period of one to two weeks at Chipps Island. Daylight sampling at Chipps Island with a 9.1 by 7.9 m, 3.2 mm cod end, midwater trawl is begun 2 to 3 days after release. When the first fish is caught, full-time trawling 7 days a week should begin. Each day's trawling consists of ten 20 minute tows generally made against the current, and distributed equally across the channel. (B) The Chipps Island smolt survival index is calculated as: SSI = R ÷ MT(0.007692) where R = number of recaptures of tagged fish M = number of marked (tagged) fish released T = proportion of time sampled vs total time tagged fish were passing the site (i.e. time between first and last tagged fish recovery) Where the value 0.007692 is the proportion of the channel width fished by the trawl, and is calculated as trawl width/channel width. (C) Recoveries of tagged fish from the ocean salmon fishery two to four years after release are also used to calculate a survival index for each release. Smolt survival indices from ocean recoveries are calculated as: OSI = R 1 1 2 2 where R 1 M 1 R 2 M 2 ( 1 ( 2 (3) Suisun marsh criteria. (ii) [Reserved] (b) Revised criteria. Location Sampling site Nos (I--A/RKI) Parameter Description Index type San Joaquin Valley Index Dates Values San Joaquin River at Jersey Point, San Andreas Landing, Prisoners Point, Buckley Cove, Rough and Ready Island, Brandt Bridge, Mossdale, and Vernalis D15/RSAN018, Specific 14-day running average of mean daily for the period not more than value shown, in mmhos Not Applicable >2.5 MAF April 1 to May 31 0.44 micro-mhos. San Joaquin River at Jersey Point, San Andreas Landing and Prisoners Point D15/RSAN018, Specific Conductance 14-day running average of mean daily for the period not more than value shown, in mmhos Not Applicable ≤2.5 MAF April 1 to May 31 0.44 micro-mhos. (c) Definitions. (1) Water year. (2) 8-River Index. (i) Sacramento River at Band Bridge, near Red Bluff; (ii) Feather River, total inflow to Oroville Reservoir; (iii) Yuba River at Smartville; (iv) American River, total inflow to Folsom Reservoir; (v) Stanislaus River, total inflow to New Melones Reservoir; (vi) Tuolumne River, total inflow to Don Pedro Reservoir; (vii) Merced River, total inflow to Exchequer Reservoir; and (viii) San Joaquin River, total inflow to Millerton Lake. (3) San Joaquin Valley Index. I SJ where I SJ X = Current year's April-July San Joaquin Valley unimpaired runoff Y = Current year's October-March San Joaquin Valley unimpaired runoff Z = Previous year's index in MAF, not to exceed 0.9 MAF (ii) Measuring San Joaquin Valley unimpaired runoff. (4) Salinity. [60 FR 4707, Jan. 24, 1995] § 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. (a) Scope. (b) Criteria. Table 1 to Paragraph (b)(1) (i) California Freshwater Selenium Ambient Chronic Water Quality Criterion for Protection of Aquatic Life and Aquatic-Dependent Wildlife. Table 2 to Paragraph (b)(1)(i) (ii) Priority toxic pollutants. (iii) Criteria recommendations not included in table 1 to this paragraph (b)(1). (iv) Freshwater and saltwater aquatic life criteria. (2) Factors for Calculating Metals Criteria. Final CMC and CCC values should be rounded to two significant figures. (i) CMC WER Acute Conversion Factor) m A hardness b A (ii) CCC WER Chronic Conversion Factor m C hardness b C (iii) Table 1 to paragraph (b)(2) of this section: Metal m A b A m C b C Cadmium 1.128 −3.6867 0.7852 −2.715 Copper 0.9422 −1.700 0.8545 −1.702 Chromium (III) 0.8190 3.688 0.8190 1.561 Lead 1.273 −1.460 1.273 −4.705 Nickel 0.8460 2.255 0.8460 0.0584 Silver 1.72 −6.52 Zinc 0.8473 0.884 0.8473 0.884 Note to Table 1: The term “exp” represents the base e exponential function. (iv) Table 2 to paragraph (b)(2) of this section: Metal Conversion factor (CF) for freshwater acute criteria CF for freshwater chronic criteria CF for saltwater acute criteria CF a Antimony ( d ( d ( d ( d Arsenic 1.000 1.000 1.000 1.000 Beryllium ( d ( d ( d ( d Cadmium b b 0.994 0.994 Chromium (III) 0.316 0.860 ( d ( d Chromium (VI) 0.982 0.962 0.993 0.993 Copper 0.960 0.960 0.83 0.83 Lead b b 0.951 0.951 Mercury Nickel 0.998 0.997 0.990 0.990 Selenium ( c 0.998 0.998 Silver 0.85 ( d 0.85 ( d Thallium ( d ( d ( d ( d Zinc 0.978 0.986 0.946 0.946 Footnotes to table 2 of paragraph( b a b 3 c d Note to table 2 of paragraph ( b The term “Conversion Factor” represents the recommended conversion factor for converting a metal criterion expressed as the total recoverable fraction in the water column to a criterion expressed as the dissolved fraction in the water column. See “Office of Water Policy and Technical Guidance on Interpretation and Implementation of Aquatic Life Metals Criteria”, October 1, 1993, by Martha G. Prothro, Acting Assistant Administrator for Water available from Water Resource Center, USEPA, Mailcode RC4100, M Street SW, Washington, DC 20460 and the note to § 131.36(b)(1). (v) Table 3 to paragraph (b)(2) of this section: Acute Chronic Cadmium CF = 1.136672—[(ln {hardness}) (0.041838)] CF = 1.101672—[(ln {hardness})(0.041838)] Lead CF = 1.46203—[(ln {hardness})(0.145712)] CF = 1.46203—[(ln {hardness})(0.145712)] (c) Applicability. (2) The criteria established in this section are subject to the State's general rules of applicability in the same way and to the same extent as are other Federally-adopted and State-adopted numeric toxics criteria when applied to the same use classifications including mixing zones, and low flow values below which numeric standards can be exceeded in flowing fresh waters. (i) For all waters with mixing zone regulations or implementation procedures, the criteria apply at the appropriate locations within or at the boundary of the mixing zones; otherwise the criteria apply throughout the water body including at the point of discharge into the water body. (ii) The State shall not use a low flow value below which numeric standards can be exceeded that is less stringent than the flows in Table 4 to paragraph (c)(2) of this section for streams and rivers. (iii) Table 4 to paragraph (c)(2) of this section: Criteria Design flow Aquatic Life Acute Criteria (CMC) 1 Q 10 or 1 B 3 Aquatic Life Chronic Criteria (CCC) 7 Q 10 or 4 B 3 Human Health Criteria Harmonic Mean Flow Note to table 4 of paragraph ( c 1. CMC (Criteria Maximum Concentration) is the water quality criteria to protect against acute effects in aquatic life and is the highest instream concentration of a priority toxic pollutant consisting of a short-term average not to be exceeded more than once every three years on the average. 2. CCC (Continuous Criteria Concentration) is the water quality criteria to protect against chronic effects in aquatic life and is the highest in stream concentration of a priority toxic pollutant consisting of a 4-day average not to be exceeded more than once every three years on the average. 3. 1 Q 10 is the lowest one day flow with an average recurrence frequency of once in 10 years determined hydrologically. 4. 1 B 3 is biologically based and indicates an allowable exceedence of once every 3 years. It is determined by EPA's computerized method (DFLOW model). 5. 7 Q 10 is the lowest average 7 consecutive day low flow with an average recurrence frequency of once in 10 years determined hydrologically. 6. 4 B 3 is biologically based and indicates an allowable exceedence for 4 consecutive days once every 3 years. It is determined by EPA's computerized method (DFLOW model). (iv) If the State does not have such a low flow value below which numeric standards do not apply, then the criteria included in paragraph (d) of this section apply at all flows. (v) If the CMC short-term averaging period, the CCC four-day averaging period, or once in three-year frequency is inappropriate for a criterion or the site to which a criterion applies, the State may apply to EPA for approval of an alternative averaging period, frequency, and related design flow. The State must submit to EPA the bases for any alternative averaging period, frequency, and related design flow. Before approving any change, EPA will publish for public comment, a document proposing the change. (3) The freshwater and saltwater aquatic life criteria in the matrix in paragraph (b)(1) of this section apply as follows: (i) For waters in which the salinity is equal to or less than 1 part per thousand 95% or more of the time, the applicable criteria are the freshwater criteria in Column B; (ii) For waters in which the salinity is equal to or greater than 10 parts per thousand 95% or more of the time, the applicable criteria are the saltwater criteria in column C, except for selenium in waters of the San Francisco Bay upstream to and including Suisun Bay and the Sacramento-San Joaquin Delta where the applicable criteria are the freshwater criteria in column B of the National Toxic Rule (“NTR”) at § 131.36. (iii) For waters in which the salinity is between 1 and 10 parts per thousand as defined in paragraphs (c)(3)(i) and (ii) of this section, the applicable criteria are the more stringent of the freshwater or saltwater criteria, except for selenium in waters of the San Francisco Bay upstream to and including Suisun Bay and the Sacramento-San Joaquin Delta where the applicable criteria are the freshwater criteria in column B of the NTR. However, the Regional Administrator may approve the use of the alternative freshwater or saltwater criteria if scientifically defensible information and data demonstrate that on a site-specific basis the biology of the water body is dominated by freshwater aquatic life and that freshwater criteria are more appropriate; or conversely, the biology of the water body is dominated by saltwater aquatic life and that saltwater criteria are more appropriate. Before approving any change, the EPA will publish for public comment a document proposing the change. (4) Application of metals criteria. (ii) The hardness values used shall be consistent with the design discharge conditions established in paragraph (c)(2) of this section for design flows and mixing zones. (iii) The criteria for metals (compounds #1—#13 in the table in paragraph (b)(1) of this section) are expressed as dissolved except where otherwise noted. For purposes of calculating aquatic life criteria for metals from the equations in footnote i to the table in paragraph (b)(1) of this section and the equations in paragraph (b)(2) of this section, the water effect ratio is generally computed as a specific pollutant's acute or chronic toxicity value measured in water from the site covered by the standard, divided by the respective acute or chronic toxicity value in laboratory dilution water. To use a water effect ratio other than the default of 1, the WER must be determined as set forth in Interim Guidance on Determination and Use of Water Effect Ratios, U.S. EPA Office of Water, EPA-823-B-94-001, February 1994, or alternatively, other scientifically defensible methods adopted by the State as part of its water quality standards program and approved by EPA. For calculation of criteria using site-specific values for both the hardness and the water effect ratio, the hardness used in the equations in paragraph (b)(2) of this section must be determined as required in paragraph (c)(4)(ii) of this section. Water hardness must be calculated from the measured calcium and magnesium ions present, and the ratio of calcium to magnesium should be approximately the same in standard laboratory toxicity testing water as in the site water. (d)(1) Except as specified in paragraph (d)(3) of this section, all waters assigned any aquatic life or human health use classifications in the Water Quality Control Plans for the various Basins of the State (“Basin Plans”) adopted by the California State Water Resources Control Board (“SWRCB”), except for ocean waters covered by the Water Quality Control Plan for Ocean Waters of California (“Ocean Plan”) adopted by the SWRCB with resolution Number 90-27 on March 22, 1990, are subject to the criteria in paragraph (d)(2) of this section, without exception. These criteria apply to waters identified in the Basin Plans. More particularly, these criteria apply to waters identified in the Basin Plan chapters designating beneficial uses for waters within the region. Although the State has adopted several use designations for each of these waters, for purposes of this action, the specific standards to be applied in paragraph (d)(2) of this section are based on the presence in all waters of some aquatic life designation and the presence or absence of the MUN use designation (municipal and domestic supply). (See Basin Plans for more detailed use definitions.) (2) The criteria from the table in paragraph (b)(1) of this section apply to the water and use classifications defined in paragraph (d)(1) of this section as follows: Water and use classification Applicable criteria (i) All inland waters of the United States or enclosed bays and estuaries that are waters of the United States that include a MUN use designation (A) Columns B1 and B2—all pollutants (ii) All inland waters of the United States or enclosed bays and estuaries that are waters of the United States that do not include a MUN use designation (A) Columns B1 and B2—all pollutants (3) Nothing in this section is intended to apply instead of specific criteria, including specific criteria for the San Francisco Bay estuary, promulgated for California in the National Toxics Rule at § 131.36. (4) The human health criteria shall be applied at the State-adopted 10 (−6) risk level. (5) Nothing in this section applies to waters located in Indian Country. (e) Schedules of compliance. (2) When a permit issued on or after May 18, 2000 to a new discharger contains a WQBEL based on water quality criteria set forth in paragraph (b) of this section, the permittee shall comply with such WQBEL upon the commencement of the discharge. A new discharger is defined as any building, structure, facility, or installation from which there is or may be a “discharge of pollutants” (as defined in 40 CFR 122.2) to the State of California's inland surface waters or enclosed bays and estuaries, the construction of which commences after May 18, 2000. (3) Where an existing discharger reasonably believes that it will be infeasible to promptly comply with a new or more restrictive WQBEL based on the water quality criteria set forth in this section, the discharger may request approval from the permit issuing authority for a schedule of compliance. (4) A compliance schedule shall require compliance with WQBELs based on water quality criteria set forth in paragraph (b) of this section as soon as possible, taking into account the dischargers' technical ability to achieve compliance with such WQBEL. (5) If the schedule of compliance exceeds one year from the date of permit issuance, reissuance or modification, the schedule shall set forth interim requirements and dates for their achievement. The dates of completion between each requirement may not exceed one year. If the time necessary for completion of any requirement is more than one year and is not readily divisible into stages for completion, the permit shall require, at a minimum, specified dates for annual submission of progress reports on the status of interim requirements. (6) In no event shall the permit issuing authority approve a schedule of compliance for a point source discharge which exceeds five years from the date of permit issuance, reissuance, or modification, whichever is sooner. Where shorter schedules of compliance are prescribed or schedules of compliance are prohibited by law, those provisions shall govern. (7) If a schedule of compliance exceeds the term of a permit, interim permit limits effective during the permit shall be included in the permit and addressed in the permit's fact sheet or statement of basis. The administrative record for the permit shall reflect final permit limits and final compliance dates. Final compliance dates for final permit limits, which do not occur during the term of the permit, must occur within five years from the date of issuance, reissuance or modification of the permit which initiates the compliance schedule. Where shorter schedules of compliance are prescribed or schedules of compliance are prohibited by law, those provisions shall govern. (8) The provisions in this paragraph (e), Schedules of compliance, shall expire on May 18, 2005. [65 FR 31711, May 18, 2000, as amended at 66 FR 9961, Feb. 13, 2001; 68 FR 62747, Nov. 6, 2003; 78 FR 20255, Apr. 4, 2013; 83 FR 52166, Oct. 16, 2018; 89 FR 101928, Dec. 17, 2024] § 131.40 Puerto Rico (a) Use designations for marine waters. Waterbody segment From To Designated use Coastal Waters 500m offshore 3 miles offshore Primary Contact Recreation. Guayanilla & Tallaboa Bays Cayo Parguera Punta Verraco Primary Contact Recreation. Mayaguez Bay Punta Guanajibo Punta Algarrobo Primary Contact Recreation. Ponce Port Punta Carenero Punta Cuchara Primary Contact Recreation. San Juan Port mouth of Río Bayamón Punta El Morro Primary Contact Recreation. Yabucoa Port Punta Icacos Punta Yeguas Primary Contact Recreation. (b) Criteria that apply to Puerto Rico's marine waters. Bacteria: The fecal coliform geometric mean of a series of representative samples (at least five samples) of the waters taken sequentially shall not exceed 200 colonies/100 ml, and not more than 20 percent of the samples shall exceed 400 colonies/100 ml. The enterococci density in terms of geometric mean of at least five representative samples taken sequentially shall not exceed 35/100 ml. No single sample should exceed the upper confidence limit of 75% using 0.7 as the log standard deviation until sufficient site data exist to establish a site-specific log standard deviation. (c) Water quality standard variances. [69 FR 3524, Jan. 26, 2004, as amended at 80 FR 51050, Aug. 21, 2015] § 131.41 Bacteriological criteria for those states not complying with Clean Water Act section 303(i)(1)(A). (a) Scope. (b) Definitions. Coastal Recreation Waters (2) Designated bathing beach waters (3) Moderate use coastal recreation waters (4) Light use coastal recreation waters (5) Infrequent use coastal recreation waters (6) New pathogen discharger (7) Existing pathogen discharger (c) EPA's section 304(a) ambient water quality criteria for bacteria. A d B C C1 C2 C3 C4 E. coli e 126/100 mil a b b b b Enterococci e 33/100 ml c b b b b Footnotes to table in paragraph (c)(1): a. This value is for use with analytical methods 1103.1, 1603, or 1604 or any equivalent method that measures viable bacteria. b. Calculated using the following: single sample maximum = geometric mean * 10 + (confidence level factor * log standard deviation), where the confidence level factor is: 75%: 0.68; 82%: 0.94; 90%: 1.28; 95%: 1.65. The log standard deviation from EPA's epidemiological studies is 0.4. c. This value is for use with analytical methods 1106.1 or 1600 or any equivalent method that measures viable bacteria. d. The State may determine which of these indicators applies to its freshwater coastal recreation waters. Until a State makes that determination, E. coli e. These values apply to E. coli (2) Marine waters: A B C C1 C2 C3 C4 Enterococci c 35/100 ml a b b b b Footnotes to table in paragraph (c)(2): a. This value is for use with analytical methods 1106.1 or 1600 or any equivalent method that measures viable bacteria. b. Calculated using the following: single sample maximum = geometric mean * 10 + (confidence level factor * log standard deviation), where the confidence level factor is: 75%: 0.68; 82%: 0.94; 90%: 1.28; 95%: 1.65. The log standard deviation from EPA's epidemiological studies is 0.7. c. These values apply to enterococci regardless of origin unless a sanitary survey shows that sources of the indicator bacteria are non-human and an epidemiological study shows that the indicator densities are not indicative of a human health risk. (3) As an alternative to the single sample maximum in paragraph (c)(1) or (c)(2) of this section, States may use a site-specific log standard deviation to calculate a single sample maximum for individual coastal recreation waters, but must use at least 30 samples from a single recreation season to do so. (d) Applicability. (2) The criteria established in this section are subject to the State's general rules of applicability in the same way and to the same extent as are other Federally-adopted and State-adopted numeric criteria when applied to the same use classifications. (e) Applicability to specific jurisdictions. (2) The criteria in paragraph (c)(2) of this section apply to marine coastal recreation waters of the following States: Alaska, California (except for coastal recreation waters within the jurisdiction of Regional Board 4), Florida, Georgia, Hawaii (except for coastal recreation waters within 300 meters of the shoreline), Louisiana, Maine (except for SA waters and SB and SC waters with human sources of fecal contamination), Maryland, Massachusetts, Mississippi, New York, North Carolina, Oregon, Puerto Rico (except for waters classified by Puerto Rico as intensely used for primary contact recreation and for those waters included in § 131.40), Rhode Island, United States Virgin Islands. (f) Schedules of compliance. (2) When a permit issued on or after December 16, 2004, to a new pathogen discharger as defined in paragraph (b) of this section contains water quality-based effluent limitations based on water quality criteria set forth in paragraph (c) of this section, the permittee shall comply with such water quality-based effluent limitations upon the commencement of the discharge. (3) Where an existing pathogen discharger reasonably believes that it will be infeasible to comply immediately with a new or more restrictive water quality-based effluent limitations based on the water quality criteria set forth in paragraph (c) of this section, the discharger may request approval from the permit issuing authority for a schedule of compliance. (4) A compliance schedule for an existing pathogen discharger shall require compliance with water quality-based effluent limitations based on water quality criteria set forth in paragraph (c) of this section as soon as possible, taking into account the discharger's ability to achieve compliance with such water quality-based effluent limitations. (5) If the schedule of compliance for an existing pathogen discharger exceeds one year from the date of permit issuance, reissuance or modification, the schedule shall set forth interim requirements and dates for their achievement. The period between dates of completion for each requirement may not exceed one year. If the time necessary for completion of any requirement is more than one year and the requirement is not readily divisible into stages for completion, the permit shall require, at a minimum, specified dates for annual submission of progress reports on the status of interim requirements. (6) In no event shall the permit issuing authority approve a schedule of compliance for an existing pathogen discharge which exceeds five years from the date of permit issuance, reissuance, or modification, whichever is sooner. (7) If a schedule of compliance exceeds the term of a permit, interim permit limits effective during the permit shall be included in the permit and addressed in the permit's fact sheet or statement of basis. The administrative record for the permit shall reflect final permit limits and final compliance dates. Final compliance dates for final permit limits, which do not occur during the term of the permit, must occur within five years from the date of issuance, reissuance or modification of the permit which initiates the compliance schedule. [69 FR 67242, Nov. 16, 2004] § 131.42 Antidegradation Implementation Methods for the Commonwealth of Puerto Rico. (a) General Policy Statement. (2) An antidegradation review shall be initiated as part of the Section 401—“Water Quality Certification Process” of the Clean Water Act. (3) The 401 Certification Process shall follow the procedures established by the February 2, 1989 Resolution R-89-2-2 of the Governing Board of the Puerto Rico Environmental Quality Board (EQB). (4) The following are not subject to an antidegradation review due to the fact that they are nondischarge systems and are managed by specific applicable Puerto Rico regulations: (i) All nonpoint sources of pollutants. (ii) Underground Storage Tanks. (iii) Underground Injection Facilities. (5) The protection of water quality shall include the maintenance, migration, protection, and propagation of desirable species, including threatened and endangered species identified in the local and federal regulations. (b) Definitions. (2) High Quality Waters: (i) Are waters whose quality is better than the mandatory minimum level to support the CWA Section 101(a)(2) goals of propagation of fish, shellfish, wildlife and recreation in and on the waters. High Quality Waters are to be identified by EQB on a parameter-by-parameter basis. (ii) [Reserved] (3) Outstanding National Resources Waters (ONRWs): (i) Are waters classified as SA or SE in the PRWQSR, as amended, or any other water designated by Resolution of the Governing Board of EQB. ONRWs are waters that are recreationally or ecologically important, unique or sensitive. (ii) [Reserved] (c) Antidegradation Review Procedure. et seq. (2) In conducting an antidegradation review, EQB will sequentially apply the following steps: (i) Determine which level of antidegradation applies (A) Tier 1—Protection of Existing and Designated Uses. (B) Tier 2—Protection of High Quality Waters. (C) Tier 3—Protection of ONRWs. (ii) [Reserved] (3) Review existing water quality data and other information submitted by the applicant. The applicant shall provide EQB with the information regarding the discharge, as required by the PRWQSR including, but not limited to the following: (i) A description of the nature of the pollutants to be discharged. (ii) Treatment technologies applied to the pollutants to be discharged. (iii) Nature of the applicant's business. (iv) Daily maximum and average flow to be discharged. (v) Effluent characterization. (vi) Effluent limitations requested to be applied to the discharge according to Section 6.11 of the PRWQSR. (vii) Location of the point of discharge. (viii) Receiving waterbody name. (ix) Water quality data of the receiving waterbody. (x) Receiving waterbody minimum flow (7Q2 and 7Q10) for stream waters. (xi) Location of water intakes within the waterbody. (xii) In the event that the proposed discharge will result in the lowering of water quality, data and information demonstrating that the discharge is necessary to accommodate important economic or social development in the area where the receiving waters are located. (4) Determine if additional information or assessment is necessary to make the decision. (5) Prepare an intent to issue or deny the 401 water quality certificate and publish a notice in a newspaper of wide circulation in Puerto Rico informing the public of EQB's preliminary decision and granting a public participation period of at least thirty (30) days. (6) Address the comments received from the interested parties and consider such comments as part of the decision making process. (7) Make the final determination to issue or deny the requested 401 certification. Such decision is subject to the reconsideration procedure established in Law 170 of August 12, 1988, Ley de Procedimiento Administrativo Uniforme del Estado Libre Asociado de Puerto Rico (d) Implementation Procedures. (i) Tier 1—Protection of Existing and Designated Uses: (A) Tier 1 waters are: ( 1 ( 2 (B) To implement Tier 1 antidegradation, EQB shall determine if a discharge would lower the water quality to the extent that it would no longer be sufficient to protect and maintain the existing and designated uses of that waterbody. (C) When a waterbody has been affected by a parameter of concern causing it to be included on the 303(d) List, then EQB will not allow an increase of the concentration of the parameter of concern or pollutants affecting the parameter of concern in the waterbody. This no increase will be achieved by meeting the applicable water quality standards at the end of the pipe. Until such time that a Total Maximum Daily Load (TMDL) is developed for the parameter of concern for the waterbody, no discharge will be allowed to cause or contribute to further degradation of the waterbody. (D) When the assimilative capacity of a waterbody is not sufficient to ensure maintenance of the water quality standard for a parameter of concern with an additional load to the waterbody, EQB will not allow an increase of the concentration of the parameter of concern or pollutants affecting the parameter of concern in the waterbody. This no increase will be achieved by meeting the applicable water quality standards at the end of the pipe. Until such time that a TMDL is developed for the parameter of concern for the waterbody, no discharge will be allowed to cause or contribute to further degradation of the waterbody. (ii) Tier 2—Protection of High Quality Waters: (A) To verify that a waterbody is a high quality water for a parameter of concern which initiates a Tier 2 antidegradation review, EQB shall evaluate and determine: ( 1 ( 2 ( 3 In multiple discharge situations, the effects of all discharges shall be evaluated through a waste load allocation analysis in accordance with the applicable provisions of Article 10 of the PRWQSR or the applicable provisions of Article 5 regarding mixing zones. (B) In order to allow the lowering of water quality in high quality waters, the applicant must show and justify the necessity for such lowering of water quality through compliance with the requirements of Section 6.11 of the PRWQSR. EQB will not allow the entire assimilative capacity of a waterbody for a parameter of concern to be allocated to a discharger, if the necessity of the requested effluent limitation for the parameter of concern is not demonstrated to the full satisfaction of EQB. (iii) Tier 3—Protection of ONRWs: (A) EQB may designate a water as Class SA or SE (ONRWs) through a Resolution (PRWQSR Sections 2.1.1 and 2.2.1). Additionally, any interested party may nominate a specific water to be classified as an ONRW and the Governing Board of EQB will make the final determination. Classifying a water as an ONRW may result in the water being named in either Section 2.1.1 or 2.2.2 of the PRWQSR, which would require an amendment of the PRWQSR. The process for amending the PRWQSR, including public participation, is set forth in Section 8.6 of said regulation. (B) The existing characteristics of Class SA and SE waters shall not be altered, except by natural causes, in order to preserve the existing natural phenomena. ( 1 ( 2 (2) Activities Regulated by CWA Section 404 or Rivers and Harbors Action Section 10 Permits (Discharge of Dredged or Fill Material) (i) EQB will only allow the discharge of dredged or fill material into a wetland if it can be demonstrated that such discharge will not have an unacceptable adverse impact either individually or in combination with other activities affecting the wetland of concern. The impacts to the water quality or the aquatic or other life in the wetland due to the discharge of dredged or fill material should be avoided, minimized and mitigated. (ii) The discharge of dredged or fill material shall not be certified if there is a practicable alternative to the proposed discharge which would have less adverse impact on the recipient ecosystem, so long as the alternative does not have other more significant adverse environmental consequences. Activities which are not water dependent are presumed to have practicable alternatives, unless the applicant clearly demonstrates otherwise. No discharge of dredged and fill material shall be certified unless appropriate and practicable steps have been taken which minimize potential adverse impacts of the discharge on the recipient ecosystem. The discharge of dredged or fill material to ONRWs, however, shall be governed by paragraph (d)(1)(iii) of this section. [72 FR 70524, Dec. 12, 2007] § 131.43 Maine. (a) Bacteria criteria for waters in Indian lands. Escherichia coli (2) In Class B, Class C, and Class GPA waters, the number of Escherichia coli (3) The bacteria content of Class SA waters shall be as naturally occurs, and the number of Enterococcus (4) In Class SA shellfish harvesting areas, the numbers of total coliform bacteria or other specified indicator organisms in samples representative of the waters in shellfish harvesting areas may not exceed the criteria recommended under the National Shellfish Sanitation Program, United States Food and Drug Administration, as set forth in the Guide for the Control of Molluscan Shellfish, 2015 Revision. The Director of the Federal Register approves this incorporation by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. You may obtain a copy from the U.S. Food and Drug Administration Center for Food Safety and Applied Nutrition, Shellfish and Aquaculture Policy Branch, 5100 Paint Branch Parkway (HFS-325), College Park, MD 20740 or http://www.fda.gov/Food/GuidanceRegulation/FederalStateFoodPrograms/ucm2006754.htm http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html (5) In Class SB and SC waters, the number of Enterococcus (b) Ammonia criteria for fresh waters in Indian lands. i.e., (2) The thirty-day average concentration of total ammonia nitrogen (in mg TAN/L) shall not exceed, more than once every three years, the criterion continuous concentration ( i.e., (3) In addition, the highest four-day average within the same 30-day period as in (2) shall not exceed 2.5 times the CCC, more than once every three years. (c) pH Criteria for fresh waters in Indian lands. (d) Temperature criteria for tidal waters in Indian lands. (i) Weekly average temperature increase shall be compared to baseline thermal conditions and shall be calculated using the daily maxima averaged over a 7-day period. (ii) Baseline thermal conditions shall be measured at or modeled from a site where there is no artificial thermal addition from any source, and which is in reasonable proximity to the thermal discharge (within 5 miles), and which has similar hydrography to that of the receiving waters at the discharge. (2) Natural temperature cycles characteristic of the waterbody segment shall not be altered in amplitude or frequency. (3) During the summer months (for the period from May 15 through September 30), water temperatures shall not exceed a weekly average summer maximum threshold of 18 °C (64.4 °F) (calculated using the daily maxima averaged over a 7-day period). (e) Natural conditions provisions for waters in Indian lands. (2) The provision in Title 38 of Maine Revised Statutes 420(2.A) which reads “Except as naturally occurs or as provided in paragraphs B and C, the board shall regulate toxic substances in the surface waters of the State at the levels set forth in federal water quality criteria as established by the United States Environmental Protection Agency pursuant to the Federal Water Pollution Control Act, Public Law 92-500, Section 304(a), as amended,” does not apply to water quality criteria intended to protect human health. (f) Mixing zone policy for waters in Indian lands. Establishing a mixing zone. (ii) The purpose of a mixing zone is to allow a reasonable opportunity for dilution, diffusion, or mixture of pollutants with the receiving waters such that an applicable criterion may be exceeded within a defined area of the waterbody while still protecting the designated use of the waterbody as a whole. In determining the extent of any mixing zone to be established under this section, the department will require from the applicant information concerning the nature and rate of the discharge; the nature and rate of existing discharges to the waterway; the size of the waterway and the rate of flow therein; any relevant seasonal, climatic, tidal, and natural variations in such size, flow, nature, and rate; the uses of the waterways that could be affected by the discharge, and such other and further evidence as in the department's judgment will enable it to establish a reasonable mixing zone for such discharge. An order establishing a mixing zone may provide that the extent thereof varies in order to take into account seasonal, climatic, tidal, and natural variations in the size and flow of, and the nature and rate of, discharges to the waterway. (2) Mixing zone information requirements. (i) Describe the amount of dilution occurring at the boundaries of the proposed mixing zone and the size, shape, and location of the area of mixing, including the manner in which diffusion and dispersion occur; (ii) Define the location at which discharge-induced mixing ceases; (iii) Document the substrate character and geomorphology within the mixing zone; (iv) Document background water quality concentrations; (v) Address the following factors; (A) Whether adjacent mixing zones overlap; (B) Whether organisms would be attracted to the area of mixing as a result of the effluent character; and (C) Whether the habitat supports endemic or naturally occurring species. (vi) Provide all information necessary to demonstrate whether the requirements in paragraph (g)(3) of this section are satisfied. (3) Mixing zone requirements. (ii) The mixing zone demonstration shall be based on the assumption that a pollutant does not degrade within the proposed mixing zone, unless: (A) Scientifically valid field studies or other relevant information demonstrate that degradation of the pollutant is expected to occur under the full range of environmental conditions expected to be encountered; and (B) Scientifically valid field studies or other relevant information address other factors that affect the level of pollutants in the water column including, but not limited to, resuspension of sediments, chemical speciation, and biological and chemical transformation. (iii) Water quality within an authorized mixing zone is allowed to exceed chronic water quality criteria for those parameters approved by the department. Acute water quality criteria may be exceeded for such parameters within the zone of initial dilution inside the mixing zone. Acute criteria shall be met as close to the point of discharge as practicably attainable. Water quality criteria shall not be violated outside of the boundary of a mixing zone as a result of the discharge for which the mixing zone was authorized. (iv) Mixing zones shall be as small as practicable. The concentrations of pollutants present shall be minimized and shall reflect the best practicable engineering design of the outfall to maximize initial mixing. Mixing zones shall not be authorized for bioaccumulative pollutants ( i.e., (v) In addition to the requirements above, the department may approve a mixing zone only if the mixing zone: (A) Is sized and located to ensure that there will be a continuous zone of passage that protects migrating, free-swimming, and drifting organisms; (B) Will not result in thermal shock or loss of cold water habitat or otherwise interfere with biological communities or populations of indigenous species; (C) Is not likely to jeopardize the continued existence of any endangered or threatened species listed under section 4 of the Endangered Species Act of 1973, as amended (16 U.S.C. 1531 et seq. (D) Will not extend to drinking water intakes and sources; (E) Will not otherwise interfere with the designated or existing uses of the receiving water or downstream waters; (F) Will not promote undesirable aquatic life or result in a dominance of nuisance species; (G) Will not endanger critical areas such as breeding and spawning grounds, habitat for state-listed threatened or endangered species, areas with sensitive biota, shellfish beds, fisheries, and recreational areas; (H) Will not contain pollutant concentrations that are lethal to mobile, migrating, and drifting organisms passing through the mixing zone; (I) Will not contain pollutant concentrations that may cause significant human health risks considering likely pathways of exposure; (J) Will not result in an overlap with another mixing zone; (K) Will not attract aquatic life; (L) Will not result in a shore-hugging plume; and (M) Is free from: ( 1 ( 2 ( 3 (g) Dissolved oxygen criteria for class A waters throughout the State of Maine, including in Indian lands. (h) Waiver or modification of protection and improvement laws for waters throughout the State of Maine, including in Indian lands. [81 FR 92487, Dec. 19, 2016, as amended at 85 FR 82939, Dec. 21, 2020] § 131.44 Florida. (a) Phosphorus Rule. http://www.regulations.gov http://water.epa.gov/lawsregs/rulesregs/floridaeverglades_index.cfm. http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. (2) In the Phosphorus Rule, strike the following text: (i) The entire paragraph (1)(a); (ii) The entire paragraph (1)(b)(2); (iii) The entire paragraph and subparagraphs (2)(b), (2)(c), (2)(d), (2)(e), (2)(e)(1), (2)(e)(2) and 2(f); (iv) The entire paragraph (2)(h); (v) The entire paragraph (2)(l); (vi) The entire paragraphs (3)(a) and (3)(b); (vii) The entire paragraph 3(f); (viii) The entire paragraph (3)(h); (ix) In (4)(d)(2)(c), the sentence, “If these limits are not met, no action shall be required, provided that the net improvement or hydropattern restoration provisions of subsection (6) below are met.”; (x) The entire paragraph (5)(a); (xi) The entire paragraph (5)(b)(2) and (5)(b)(3); (xii) The entire paragraph (5)(d); (xiii) The entire paragraph (6), including subparagraphs (6)(a), (6)(a)(1), (6)(a)(1)(a), (6)(a)(1)(b), (6)(a)(2), (6)(a)(3), (6)(a)(4), (6)(a)(5), (6)(b), (6)(b)(1), (6)(b)(2), (6)(b)(3), and (6)(c). (b) Amended Everglades Forever Act. http://www.regulations.gov http://water.epa.gov/lawsregs/rulesregs/floridaeverglades_index.cfm. http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. (2) In the Everglades Forever Act, strike the following text: (i) The entire paragraph (2)(a); (ii) In paragraph (2)(g), the phrase, “and further described in the Long-Term Plan.”; (iii) The entire paragraph (2)(j); (iv) The entire paragraph (2)(l); (v) The entire paragraph (2)(p); (vi) The entire paragraphs (3)(b), (3)(c), (3)(d) and (3)(e); (vii) In sentence 9 of paragraph (4)(a), the phrase, “design, construction, and implementation of the initial phase of the Long-Term Plan, including operation and maintenance, and research for the projects and strategies in the initial phase of the Long-Term Plan, and including”; (viii) In sentence 1 of subparagraph (4)(a)(4), the phrase, “however, the district may modify this schedule to incorporate and accelerate enhancements to STA 3/4 as directed in the Long-Term Plan;”; (ix) The entire subparagraph (4)(a)(6); (x) In subparagraph (4)(e)(2), the entire sentences 7, 8 and 9; (xi) In subparagraph (4)(e)(3), the entire sentence 3; (xii) In sentence 1 of paragraph (10), the phrase, “to implement the pre-2006 projects and strategies of the Long-Term Plan”, the phrase, “in all parts of the Everglades Protection Area”, and the phrase “and moderating provisions”; (xiii) The entire paragraph (10)(a). (3) EPA is not incorporating the text annotations added by hand to the Everglades Forever Act. These text inserts are included only for the convenience of the reader and to improve the readability of the document. [77 FR 46303, Aug. 3, 2012] § 131.45 Revision of certain Federal water quality criteria applicable to Washington. (a) Scope. (b) Criteria for priority toxic pollutants in Washington. (c) Applicability. (2) The criteria established in this section are subject to Washington's general rules of applicability in the same way and to the same extent as are other federally promulgated and state-adopted numeric criteria when applied to the same use classifications in paragraph (d) of this section. (i) For all waters with mixing zone regulations or implementation procedures, the criteria apply at the appropriate locations within or at the boundary of the mixing zones; otherwise the criteria apply throughout the waterbody including at the end of any discharge pipe, conveyance or other discharge point within the waterbody. (ii) The state must not use a low flow value below which numeric non-carcinogen and carcinogen human health criteria can be exceeded that is less stringent than the harmonic mean flow for waters suitable for the establishment of low flow return frequencies ( i.e., (iii) If the state does not have such a low flow value for numeric criteria, then none will apply and the criteria in paragraph (b) of this section herein apply at all flows. (d) Applicable use designations. (i) Fresh waters— (A) Miscellaneous uses: Harvesting (Fish harvesting); (B) Recreational uses; (C) Water supply uses: Domestic water (Domestic water supply); (ii) Marine waters— (A) Miscellaneous uses: Harvesting (Salmonid and other fish harvesting, and crustacean and other shellfish (crabs, shrimp, scallops, etc.) harvesting); (B) Recreational uses; (C) Shellfish harvesting: Shellfish harvest (Shellfish (clam, oyster, and mussel) harvesting) Note to paragraph ( d The source of these uses is Washington Administrative Code 173-201A-600 for Fresh waters and 173-201A-610 for Marine waters. (2) For Washington waters that include the use classification of Domestic Water, the criteria in column C1 and the methylmercury criterion in column C2 of Table 1 in paragraph (b) of this section apply. For Washington waters that include any of the following use classifications but do not include the use classification of Domestic Water, the criteria in column C2 of Table 1 in paragraph (b) of this section apply: Harvesting (fresh and marine waters), Recreational Uses (fresh and marine waters), and Shellfish Harvesting. [81 FR 85435, Nov. 28, 2016, as amended at 85 FR 28492, May 13, 2020; 87 FR 69198, Nov. 18, 2022] § 131.46 Aquatic life criterion for cadmium in Oregon. (a) Scope. (b) Criterion for cadmium in Oregon. Table 1—Cadmium Aquatic Life Criterion for Oregon Freshwaters Metal CAS No. Criterion Maximum Concentration (CMC) 3 Cadmium 1 2 7440439 [e (0.9789 × ln(hardness) − 3.866) 1 2 3 3 (c) Estimated Values To Calculate Cadmium Criteria. Table 2—Hardness Defaults Within Each Level III Ecoregion in Oregon Level III ecoregion Hardness 1 Coast Range 34.12 3 Willamette Valley 32.39 4 Cascades 28.39 9 Eastern Cascades Slopes and Foothills 36.08 10 Columbia Plateau 58.82 11 Blue Mountains 43.49 12 Snake River Plain 123.5 78 Klamath Mountains 40.61 80 Northern Basin and Range 98.62 (d) Applicability. (2) The criterion established in this section is subject to Oregon's general rules of applicability in the same way and to the same extent as are other federally promulgated and state-adopted numeric criteria when applied to freshwaters in Oregon where fish and aquatic life are a designated use. (i) For all waters with mixing zone regulations or implementation procedures, the criterion applies at the appropriate locations within or at the boundary of the mixing zones and outside of the mixing zones; otherwise the criterion applies throughout the water body including at the end of any discharge pipe, conveyance or other discharge point within the water body. (ii) The state shall not use a low flow value that is less stringent than the values listed below for waters suitable for the establishment of low flow return frequencies ( i.e., Acute 1Q10 or 1B3 Where: 1. 1Q10 is the lowest one-day average flow event expected to occur once every ten years, on average (determined hydrologically). 2. 1B3 is the lowest one-day average flow event expected to occur once every three years, on average (determined biologically). [82 FR 9173, Feb. 3, 2017] § 131.47 Aquatic life criteria for aluminum in Oregon. (a) Scope. (b) Criteria for aluminum in Oregon. Table 1 to Paragraph (b) Metal CAS No. Criterion maximum concentration (CMC) 3 Criterion continuous concentration (CCC) 4 Aluminum 1 2 7429905 Acute (CMC) and chronic (CCC) freshwater aluminum criteria values for a site shall be calculated using the 2018 Aluminum Criteria Calculator ( Aluminum Criteria Calculator V.2.0.xlsx 5 1 2 e.g., 3 4 5 www.epa.gov/wqc/aquatic-life-criteria-aluminum. [email protected] www.archives.gov/federal-register/cfr/ibr-locations.html. (c) Applicability. (2) The criteria established in this section are subject to Oregon's general rules of applicability in the same way and to the same extent as are other federally promulgated and state-adopted numeric criteria when applied to fresh waters in Oregon that are jurisdictional under the Clean Water Act to protect the fish and aquatic life designated uses. (3) For all waters with mixing zone regulations or implementation procedures, the criteria apply at the appropriate locations within or at the boundary of the mixing zones and outside of the mixing zones; otherwise the criteria apply throughout the water body including at the end of any discharge pipe, conveyance, or other discharge point within the water body. [86 FR 14845, Mar. 19, 2021] § 131.48 Water quality standards to protect aquatic life in the Delaware River. (a) Scope (2) The aquatic life criteria in paragraph (c) of this section apply to river miles 108.4 to 70.0 of the mainstem Delaware River for the States of Delaware, New Jersey, and Pennsylvania. (b) Aquatic life designated use (c) Dissolved oxygen criteria Table 1 to Paragraph ( c Season Magnitude Duration Exceedance frequency Spawning and Larval Development (March 1-June 30) 66 Daily Average 12 Days Cumulative (10% of the 123-day season) Juvenile Development (July 1-October 31) 66 Daily Average 12 Days Cumulative (10% of the 123-day season) 74 Daily Average 61 Days Cumulative (50% of the 123-day season) Overwintering (November 1-February 28/29) 66 Daily Average 12 Days Cumulative (10% of the 123-day season) (d) Applicability (2) The dissolved oxygen aquatic life water quality criteria in paragraph (c) of this section are the applicable dissolved oxygen criteria in Delaware, New Jersey, and Pennsylvania for river miles 108.4 to 70.0 of the mainstem Delaware River and apply concurrently with other applicable water quality criteria. (3) The designated use and criteria established are subject to Delaware's, New Jersey's, and Pennsylvania's general rules of applicability in the same way and to the same extent as are other federally promulgated and State-adopted water quality standards in those States. [90 FR 46508, Sept. 29, 2025]

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