PART 131 -- WATER QUALITY STANDARDS

Title 40 -- Protection of Environment
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PART 131 -- WATER QUALITY STANDARDS
   Subpart A -- General Provisions
      §131.1 Scope.
      §131.2 Purpose.
      §131.3 Definitions.
      §131.4 State authority.
      §131.5 EPA authority.
      §131.6 Minimum requirements for water quality standards submission.
      §131.7 Dispute resolution mechanism.
      §131.8 Requirements for Indian Tribes to administer a water quality standards program.
   Subpart B -- Establishment of Water Quality Standards
      §131.10 Designation of uses.
      §131.11 Criteria.
      §131.12 Antidegradation policy.
      §131.13 General policies.
   Subpart C -- Procedures for Review and Revision of Water Quality Standards
      §131.20 State review and revision of water quality standards.
      §131.21 EPA review and approval of water quality standards.
      §131.22 EPA promulgation of water quality standards.
   Subpart D -- Federally Promulgated Water Quality Standards
      §131.31 Arizona.
      §131.32 Pennsylvania.
      §131.33 Idaho.
      §131.34 Kansas.
      §131.35 Colville Confederated Tribes Indian Reservation.
      §131.36 Toxics criteria for those states not complying with Clean Water Act section 303(c)(2)(B).
      §131.37 California.
      §131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California.
      §131.38 Establishment of Numeric Criteria for priority toxic pollutants for the State of California.