EPA announces intent to keep PFOA/PFOS MCLs while extending compliance deadline and reconsidering other PFAS determinations

EPA announced it will retain the National Primary Drinking Water Regulation (NPDWR) maximum contaminant levels (MCLs) for PFOA and PFOS, but intends to extend the compliance date to 2031 (via future rulemaking that EPA stated it plans to propose “this fall” and finalize in Spring 2026). EPA also stated its intent to rescind and reconsider regulatory determinations/elements for PFHxS, PFNA, HFPO-DA (GenX), and the Hazard Index mixture approach (PFHxS, PFNA, HFPO-DA, and PFBS). Compliance teams supporting public water systems and affected suppliers should monitor for the forthcoming proposal, reassess compliance project timelines, and track potential scope changes to regulated PFAS under the NPDWR.