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EPA/OW RIN: 2040-AG18 Publication ID: Spring 2021 
Title: ●Per- and polyfluoroalkyl substances (PFAS): Perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) National Primary Drinking Water Regulation Rulemaking 

On March 3, 2021, the Environmental Protection Agency (EPA) published the Fourth Regulatory Determinations in Federal Register, including a determination to regulate perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) in drinking water. Per the Safe Drinking Water Act, following publication of the Regulatory Determination, the Administrator shall propose a maximum contaminant level goal (MCLG) and a national primary drinking water regulation (NPDWR) not later than 24 months after determination and promulgate a NPDWR within 18 months after proposal (the statute authorizes a 9-month extension of this promulgation date). With this action, EPA intends to develop a proposed national primary drinking water regulation for PFOA and PFOS, and as appropriate, take final action. Additionally, EPA will continue to consider other PFAS as part of this action.

Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Long-Term Actions 
Major: Undetermined  Unfunded Mandates: Undetermined 
CFR Citation: Not Yet Determined     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: 42 U.S.C. 300f et seq.   
Legal Deadline:
Action Source Description Date
NPRM  Statutory  Safe Drinking Water Act  03/03/2023 
Final  Statutory  Safe Drinking Water Act  09/03/2024 
Action Date FR Cite
NPRM  03/00/2023 
Final Action  09/00/2024 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Federal, Local, State, Tribal 
Federalism: Undetermined 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Alexis Lan
Environmental Protection Agency
Office of Water
1200 Pennsylvania Avenue NW, 4601M,
Washington, DC 20460
Phone:202 564-0841