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EPA/OW RIN: 2040-AG49 Publication ID: 2026 
Title: Extending the Compliance Deadline for the PFAS National Primary Drinking Water Regulation Rulemaking 
Abstract:

The EPA is proposing a new rule that provides additional time for public water systems to meet the compliance deadlines for the Maximum Contaminant Levels in the National Primary Drinking Water Regulations for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS). Through this rule, the EPA intends to address the most significant compliance challenges the Agency has heard from public water systems and other stakeholders while still ensuring the long-term protection of the American people from PFAS-contaminated drinking water.

 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Undetermined  Unfunded Mandates: No 
EO 14192 Designation: Deregulatory 
CFR Citation: 40 CFR Part 469 Subpart C     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: 42 U.S.C. 300g-1    42 U.S.C. 300j-9   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  07/00/2026 
Final Rule  07/00/2026 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State, Tribal 
Small Entities Affected: Businesses, Governmental Jurisdictions, Organizations  Federalism: No 
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
Email: lan.alexis@epa.gov