The Public Comment Window on EPA's PFAS Rollback Closes July 20 — What's at Stake

The public comment period on the EPA’s two proposed PFAS drinking-water rules closes Monday, July 20, 2026 — the last formal opportunity for water utilities, health advocates, and the public to weigh in before the agency moves toward finalizing a significant rollback of the 2024 federal PFAS standards. One rule would rescind the drinking-water limits for four PFAS compounds; the other would give systems two extra years, until 2031, to meet the PFOA and PFOS limits. Both followed a virtual public hearing the EPA held on July 7, 2026, which we covered when it was announced in our report on the July PFAS rescission hearing. This piece is the deadline reminder and a plain-language summary of what each rule actually does. For background on the compounds themselves, see our PFAS contaminant page and our guide to PFAS in drinking water.

The Two Rules, Briefly

Rule 1 — Rescission (Docket EPA-HQ-OW-2025-0654). This proposal would rescind the regulatory determinations and drinking-water regulations for PFHxS, PFNA, HFPO-DA (commonly known as GenX chemicals), and the Hazard Index that governs mixtures of those three plus PFBS. The EPA frames the rescission as a procedural correction rather than a scientific reversal: the agency argues that the 2024 PFAS rule was promulgated through an unlawful process, because the EPA simultaneously proposed and finalized the regulatory determinations and the standards for these four PFAS instead of following the Safe Drinking Water Act’s sequential notice-and-comment sequence. If finalized, the enforceable federal limits for these four compounds would go away, though the underlying health concerns and any state-level limits would not. We covered the mechanics of this proposal when it was published in our PFAS rescission proposed-rule explainer.

Rule 2 — Compliance Extension (Docket EPA-HQ-OW-2025-1742). This proposal keeps the PFOA and PFOS maximum contaminant levels in place at 4.0 parts per trillion each — it does not weaken those two limits — but creates a federal exemption framework allowing drinking-water systems to request two additional years, moving the compliance deadline from 2029 to 2031. The mechanism would govern how systems in states, territories, and tribes that have not obtained primacy for the PFOA/PFOS limits could request that two-year exemption. The MCLs themselves are unchanged; what shifts is the timeline for meeting them.

Why It Matters

Taken together, the two rules narrow the 2024 framework in different ways. The rescission would remove enforceable federal limits for four PFAS entirely; the extension would preserve the two most-studied limits but delay when utilities must actually hit them. For a household, the practical effect is the same in the near term — less federally guaranteed protection, sooner — but the legal and political paths are distinct, which is why the EPA split them into separate dockets with separate comment records.

The comment period is not a formality. Under the Administrative Procedure Act, the EPA must consider and respond to substantive comments, and the comment record becomes part of the basis for any legal challenge to the final rule. The 2024 standards were themselves the target of litigation, and whatever the EPA finalizes here will almost certainly be challenged in court by one side or the other. A well-documented comment record — from utilities describing real compliance costs and timelines, and from health and community groups documenting exposure — shapes both the final rule and how it fares on review.

How to Comment Before July 20

Written comments go into the public docket at regulations.gov, filed under the relevant Docket ID:

Rescission rule: search EPA-HQ-OW-2025-0654
Compliance extension rule: search EPA-HQ-OW-2025-1742

Comments are most useful when they are specific: a utility describing its actual treatment timeline and costs, or a resident citing local PFAS test results, carries more weight than a general statement of support or opposition. The deadline is Monday, July 20, 2026, for both dockets.

What Comes Next

After July 20, the EPA reviews the comment record and works toward final rules. There is no fixed statutory clock for finalization, and litigation is expected regardless of the outcome, so the timeline from here is measured in months, not weeks. In the meantime, the 2024 PFAS rule remains the law: the PFOA and PFOS limits of 4.0 ppt stand, and the four PFAS the rescission targets are still regulated until any final rule takes effect. Households concerned about PFAS do not need to wait on Washington — a certified point-of-use filter is the most direct protection.

What Households Can Do Now

Federal rulemaking moves slowly and the outcome is uncertain, but PFAS removal at the tap does not depend on it. Reverse osmosis and activated-carbon systems certified to NSF/ANSI 53 or NSF/ANSI 58 for PFOA/PFOS reduction are the proven residential options; our guides to reverse osmosis systems and under-sink filters cover certified choices. If you are on a private well — which is not covered by federal PFAS rules at all — see our guide to PFAS in private wells. To find out whether PFAS has been detected in your community’s water, search your address on the WaterVerge homepage.

How WaterVerge Tracks This

WaterVerge integrates EPA UCMR 5 PFAS monitoring results and SDWIS compliance data into our city and state pages, so a utility’s PFAS detections appear on its page regardless of how the federal limits shift. We will update our coverage when the EPA finalizes either rule.