EPA proposes extending PFOA/PFOS drinking-water deadlines to 2031—what changes

The U.S. Environmental Protection Agency has proposed a rule that would let certain public water systems request a federal exemption from the current compliance deadline for legally enforceable drinking-water limits for two PFAS chemicals: PFOA and PFOS. The key takeaway for customers: the proposal would not change the April 2024 MCL levels; it would change when eligible systems must reach those enforceable limits.

What EPA is proposing (and what it is not)

EPA says the goal is to uphold the April 2024 legally enforceable Maximum Contaminant Levels (MCLs) for PFOA and PFOS while strengthening practical implementation by providing an option for drinking water systems to request two additional years to comply—to 2031.

In EPA’s summary, the “federal exemption framework” is a request-and-approval mechanism for systems in states, territories, and Tribes that have not obtained primacy for the PFOA/PFOS MCLs. If a system is granted an exemption, it would still have to keep following monitoring, reporting, and customer-notification duties tied to the April 2024 PFAS National Primary Drinking Water Regulation (NPDWR).

The deadlines that matter

Under the April 2024 PFAS NPDWR baseline schedule, systems must generally comply by April 26, 2029. EPA’s proposal would give eligible, exempted systems until April 26, 2031 to achieve compliance with the enforceable PFOA and PFOS MCLs.

EPA’s rulemaking timeline also includes specific dates for public input:

• Virtual public hearing: July 7, 2026
• Written comments due: July 20, 2026
• Docket ID: EPA-HQ-OW-2025-1742
• Exemption information deadline (for systems seeking an exemption): November 16, 2026

How monitoring, reporting, and customer notices would work during any extension

EPA is explicit that monitoring and reporting of PFOA/PFOS sample results would continue under the timeframes in the April 2024 PFAS NPDWR—even if a system is granted additional time to meet the enforceable limits.

EPA also says exempted systems would have to notify the people they serve, including explaining that an exemption is in place and describing steps the system is taking to comply by the end of the exemption period (April 2031). Community systems would also provide required results through Consumer Confidence Report schedules.

What residents should watch for: the “12 ppt” mitigation trigger

A practical part of the proposal is what happens when results are elevated during the exemption window. EPA says that for systems granted the federal exemption, a PFOA or PFOS sample result at or above 12 ppt would require the system to implement short-term mitigation actions to reduce exposure to consumers during the exemption period.

Important context: EPA frames the 12 ppt figure as a trigger for additional interim mitigation steps during any exemption period—it is not presented as a replacement for the underlying enforceable MCLs.

So does “more time” weaken health protections?

EPA’s proposal is designed to prevent that interpretation: the underlying federal MCLs from the April 2024 rule would remain in place. What could change is timing—how long eligible systems have to come into compliance—and the specific interim mitigation and customer-notice expectations during any granted exemption window.

Practical next steps for customers

• Check your utility’s PFAS information in public notices and Consumer Confidence Reports for language referencing an exemption.
• Look for mitigation details: if the notices describe results at or above 12 ppt, see what short-term actions the utility says it will take during the exemption period.
• Contact the utility if notices don’t clearly explain the exemption status, the steps underway, and how residents can get updated sampling information.

Sources

• U.S. EPA — Proposed PFOA and PFOS Compliance Extension Rule (EPA explainer; updated July 8, 2026)
• Federal Register (May 20, 2026) — Proposed rule text: Extend the compliance deadline for PFOA and PFOS MCLs (Federal exemption framework)