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Part 131
FEDERAL · 40 CFR
Part 131 — Water Quality Standards
35 sections · Title 40: Protection of Environment
§ 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.
§ 131.9
Protection of Tribal reserved rights.
§ 131.10
Designation of uses.
§ 131.11
Criteria.
§ 131.12
Antidegradation policy and implementation methods.
§ 131.13
General policies.
§ 131.14
Water quality standards variances.
§ 131.15
Authorizing the use of schedules of compliance for water quality-based effluent limits in NPDES permits.
§ 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.
§ 131.31
Arizona.
§ 131.32
§ 131.32 [Reserved]
§ 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.
§ 131.40
Puerto Rico
§ 131.41
Bacteriological criteria for those states not complying with Clean Water Act section 303(i)(1)(A).
§ 131.42
Antidegradation Implementation Methods for the Commonwealth of Puerto Rico.
§ 131.43
Maine.
§ 131.44
Florida.
§ 131.45
Revision of certain Federal water quality criteria applicable to Washington.
§ 131.46
Aquatic life criterion for cadmium in Oregon.
§ 131.47
Aquatic life criteria for aluminum in Oregon.
§ 131.48
Water quality standards to protect aquatic life in the Delaware River.