Title 40, Part 131 — Water Quality Standards
35 sections
Section 131.1
Scope.
Section 131.2
Purpose.
Section 131.3
Definitions.
Section 131.4
State authority.
Section 131.5
EPA authority.
Section 131.6
Minimum requirements for water quality standards submission.
Section 131.7
Dispute resolution mechanism.
Section 131.8
Requirements for Indian Tribes to administer a water quality standards program.
Section 131.9
Protection of Tribal reserved rights.
Section 131.10
Designation of uses.
Section 131.11
Criteria.
Section 131.12
Antidegradation policy and implementation methods.
Section 131.13
General policies.
Section 131.14
Water quality standards variances.
Section 131.15
Authorizing the use of schedules of compliance for water quality-based effluent limits in NPDES permits.
Section 131.20
State review and revision of water quality standards.
Section 131.21
EPA review and approval of water quality standards.
Section 131.22
EPA promulgation of water quality standards.
Section 131.31
Arizona.
Section 131.32
[Reserved]
Section 131.33
Idaho.
Section 131.34
Kansas.
Section 131.35
Colville Confederated Tribes Indian Reservation.
Section 131.36
Toxics criteria for those states not complying with Clean Water Act section 303(c)(2)(B).
Section 131.37
California.
Section 131.38
Establishment of numeric criteria for priority toxic pollutants for the State of California.
Section 131.40
Puerto Rico
Section 131.41
Bacteriological criteria for those states not complying with Clean Water Act section 303(i)(1)(A).
Section 131.42
Antidegradation Implementation Methods for the Commonwealth of Puerto Rico.
Section 131.43
Maine.
Section 131.44
Florida.
Section 131.45
Revision of certain Federal water quality criteria applicable to Washington.
Section 131.46
Aquatic life criterion for cadmium in Oregon.
Section 131.47
Aquatic life criteria for aluminum in Oregon.
Section 131.48
Water quality standards to protect aquatic life in the Delaware River.