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EPA - 40 CFR PART 131

WATER QUALITY STANDARDS

active, Most Current
Organization: EPA
Publication Date: 1 July 2017
Status: active
Page Count: 97

Document History

40 CFR PART 131
July 1, 2023
WATER QUALITY STANDARDS
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....
40 CFR PART 131
July 1, 2021
WATER QUALITY STANDARDS
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....
40 CFR PART 131
July 1, 2020
WATER QUALITY STANDARDS
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....
40 CFR PART 131
July 1, 2019
WATER QUALITY STANDARDS
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....
40 CFR PART 131
July 1, 2018
WATER QUALITY STANDARDS
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....
40 CFR PART 131
July 1, 2017
WATER QUALITY STANDARDS
A description is not available for this item.
40 CFR PART 131
July 1, 2016
WATER QUALITY STANDARDS
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....
40 CFR PART 131
July 1, 2015
WATER QUALITY STANDARDS
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....
40 CFR PART 131
July 1, 2013
WATER QUALITY STANDARDS
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....
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References

This document is referenced by:
D6954 - Standard Guide for Exposing and Testing Plastics that Degrade in the Environment by a Combination of Oxidation and Biodegradation
January 1, 2024
This guide provides a framework or road map to compare and rank the controlled laboratory rates of degradation and degree of physical property losses of polymers by thermal and photooxidation...
This document is referenced by:
ASTM D6800 - Standard Practice for Preparation of Water Samples Using Reductive Precipitation Preconcentration Technique for ICP-MS Analysis of Trace Metals
Published by ASTM on July 15, 2018
Toxic elements may be present in ambient waters and may enter the food chain via uptake by plants and animals; the actual concentrations of toxic metals are usually sub-ng/mL. The U.S. EPA has...
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