Data / Federal rules / 2026-10086

Extending the Compliance Deadline for the PFOA and PFOS Maximum Contaminant Levels

The Environmental Protection Agency published this proposed rule in the Federal Register on May 20, 2026. Comments closed on July 20, 2026.

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What the agency says

In this proposed rulemaking, the U.S. Environmental Protection Agency (EPA) proposes a federal exemption, pursuant to Safe Drinking Water Act (SDWA) 1416(f) and 1450(a)(1), that will extend the dates of compliance with the Maximum Contaminant Levels (MCLs) for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) from April 26, 2029, to April 26, 2031, for those systems that submit a request. The Agency requests comment on this proposal, including the mechanisms through which the MCL compliance deadlines for PFOA and PFOS can be exempted, and has identified specific areas where public input will be helpful for the EPA in developing the final rule. In addition to seeking written input, the EPA will be holding a public hearing on July 7, 2026.

Key facts

Document number: 2026-10086
Type: Proposed rule
Action: Notice of proposed rule; request for public comment; notice of public hearing
Agency: Environmental Protection Agency
Published: May 20, 2026
Comments due: July 20, 2026
Dates: Comments must be received on or before July 20, 2026. Comments on the information collection provisions of the proposed rule under the Paperwork Reduction Act (PRA) must be received by the Office of Management and Budget's Office of Information and Regulatory Affairs (OMB-OIRA) on or before June 22, 2026. Please refer to the PRA section under "Statutory and Executive Order Reviews" in this preamble for specific instructions.
Docket: EPA-HQ-OW-2025-1742; FRL 8543.1-01-OW
Regulation ID (RIN): 2040-AG49
Code of Federal Regulations: 40 CFR 142
Topics: Environmental protection; Water supply
Significant: Yes, under Executive Order 12866
Pages: 24

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on environmental protection · Rules on water supply · Published in May 2026

Read from the Federal Register API, last updated 2026-10-24. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.