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In the sections below we provide a list of resources to contextualize the rule, as well as information to write and submit your own public comments
The Federal Register is the official daily publication of the U.S. federal government. All proposed and final rules are required to be published in the Federal Register. When writing a public comment, the proposed rule is the most critical document to read thoroughly, since your public comment is in response to this document. The best place to start is the “Background” or “Introduction” section, as those sections of proposed rules provide useful information about the history of an issue and the agency’s assertion about its authority or responsibility to (de)regulate it, and they often provide information about assumptions that may underlie the proposed rule.
The Federal Register notice for this proposed rule can be found here:
Historical amendments and revisions, including the 2026 proposed rule, are all linked below:
| Date | Action |
|---|---|
| April 2024 | EPA announced the final PFAS National Primary Drinking Water Regulation that included legally enforceable drinking water maximum contaminant levels for PFOA and PFOS (specific chemicals within the PFAS family, as well as PFHxS, PFNA, HFPO-DA (three types of PFAS), and mixtures of these, requiring public water system compliance by April 2029. |
| May 2025 | EPA announced its intent to rescind the regulations and reconsider the regulatory determinations related to these four PFAS, on the ground that the determinations and any resulting drinking water regulation needed to follow the Safe Drinking Water Act process. EPA also announced its intent to extend the compliance deadlines for PFOA and PFOS and establish a federal exemption framework. |
| May 2026 | EPA proposed a rule to extend the compliance deadline for PFOA and PFOS. Simultaneously, EPA announced a separate proposed rule, seeking to rescind regulatory determinations and regulations for PFHxS, PFNA, HFPO-DA, and Hazard Index Mixtures. |
The docket on regulations.gov is the home for documents relevant to a rule, including the proposed or final rule itself, technical supporting documentation, regulatory or other impact analyses, and other documents the rulemaking working group deems necessary. Public comments that have already been submitted can also be found in the rule’s docket. Anyone can submit a public comment digitally through the docket on regulations.gov.
The docket for this proposed rule can be found in Docket ID No. EPA-HQ-OW-2025-1742-0001 at Regulations.gov, here:
Within this docket, there are relevant technical documents for the proposed rule. Depending on the interest of the commenter, several documents may be of use: