Comment submitted by Shelby Greenfield

I am submitting this comment to strongly oppose the proposed two-year extension of the compliance deadline for PFOA and PFOS Maximum Contaminant Levels, from April 2029 to April 2031. PFOA and PFOS are known, scientifically documented carcinogens and toxic substances. EPA itself finalized these enforceable limits in 2024 after extensive review of the health evidence. That determination has not changed. The science has not changed. What has changed is EPA's willingness to hold water systems to the standard it already set. Public water systems (PWSs) have known about these requirements since April 2024. They will still have two and a half years remaining under the original deadline before this extension would even take effect. That is more than enough time to make meaningful progress — securing funding, selecting treatment technology, and beginning implementation — if systems act now instead of waiting for a further delay to materialize. This proposed extension is being justified on procedural grounds, not on any new safety finding. That distinction matters. Using a technicality to postpone protections against known carcinogens is not sound regulatory practice — it is an abdication of EPA's core mission to protect public health. Every additional year that these contaminants remain unregulated in practice is another year of avoidable exposure for millions of Americans, particularly in communities that already lack the resources to address contamination on their own timeline. I urge EPA to: 1. Reject this proposed extension and maintain the original April 2029 compliance deadline. 2. Provide PWSs with implementation support — technical assistance and funding — rather than more time, if the stated obstacle is capacity rather than feasibility. 3. Hold PWSs accountable to the deadline EPA already determined was necessary to protect public health, rather than retreating from it under pressure. The public was promised protection from these substances by 2029. EPA should keep that promise, not push it further out of reach. We want these chemicals out of our drinking water.