<RULE>
ENVIRONMENTAL PROTECTION AGENCY
<CFR>40 CFR Part 136</CFR>
<DEPDOC>[EPA-HQ-OW-2022-0901; FRL 9346-02-OW]</DEPDOC>
<RIN>RIN 2040-AG25</RIN>
<SUBJECT>Clean Water Act Methods Update Rule for the Analysis of Effluent</SUBJECT>
<HD SOURCE="HED">AGENCY:</HD>
Environmental Protection Agency (EPA).
<HD SOURCE="HED">ACTION:</HD>
Final rule.
<SUM>
<HD SOURCE="HED">SUMMARY:</HD>
The U.S. Environmental Protection Agency (EPA) is finalizing changes to its test procedures required to be used by industries and municipalities when analyzing the chemical, physical, and biological properties of wastewater and other samples for reporting under the EPA's National Pollutant Discharge Elimination System permit program. The Clean Water Act requires the EPA to promulgate these test procedures (analytical methods) for analysis of pollutants. The EPA anticipates that these changes will provide increased flexibility for the regulated community in meeting monitoring requirements while improving data quality. In addition, this update to the CWA methods will incorporate technological advances in analytical technology and make a series of minor changes and corrections to existing approved methods. As such, the EPA expects that these changes will not result in any negative economic impacts.
</SUM>
<EFFDATE>
<HD SOURCE="HED">DATES:</HD>
This final rule is effective on June 17, 2024. The incorporation by reference of certain material listed in this rule and is approved by the Director of the Federal Register as of June 17, 2024.
</EFFDATE>
<HD SOURCE="HED">ADDRESSES:</HD>
The EPA has established a docket for this action under Docket ID No. EPA-OW-HQ-2022-0901. All documents in the docket are listed on the
<E T="03">http://www.regulations.gov</E>
website. Although listed in the index, some information is not publicly available,
<E T="03">e.g.,</E>
CBI or other information whose disclosure is restricted by statute. Certain other material, such as co
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