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e-CFR data is current as of October 27, 2020

Title 40Chapter ISubchapter DPart 131


TITLE 40—Protection of Environment

CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

SUBCHAPTER D—WATER PROGRAMS

PART 131—WATER QUALITY STANDARDS

rule

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.
rule

Subpart B—ESTABLISHMENT OF WATER QUALITY STANDARDS

§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.
rule

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.
rule

Subpart D—FEDERALLY PROMULGATED WATER QUALITY STANDARDS

§131.31
Arizona.
§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.

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