Extending the Compliance Deadline for the PFOA and PFOS Maximum Contaminant Levels
Key claim: The EPA proposes extending the compliance deadline for PFOA and PFOS maximum contaminant levels in drinking water from April 26, 2029, to April 26, 2031, for systems that request an exemption under the Safe Drinking Water Act.
Abstract
(Proposed Rule · Environmental Protection Agency) 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.
Why this matters
The PFOA/PFOS MCLs are among the first federal drinking-water limits for PFAS and drive substantial treatment costs for utilities; shifting the exemption compliance deadline by two years alters the timeline over which water systems must install treatment or find alternative sources. The extension eases near-term capital and operating burdens on smaller or resource-constrained systems, while lengthening potential exposure windows for consumers of noncompliant water — a tradeoff between affordability/feasibility and public health protection.