EPA announces it will keep PFOA/PFOS MCLs and intends to extend compliance deadline and reconsider other PFAS determinations

EPA announced it will retain the National Primary Drinking Water Regulation maximum contaminant levels (MCLs) for PFOA and PFOS, but intends to extend the compliance timeline (EPA states it plans to propose extending the deadline to 2031, with a final rule targeted for Spring 2026). EPA also announced its intent to rescind and reconsider regulatory determinations/regulations for PFHxS, PFNA, HFPO-DA (GenX), and the Hazard Index mixture approach (PFHxS, PFNA, HFPO-DA, PFBS). Compliance teams for public water systems and supporting suppliers should monitor for proposed and final rulemaking that may alter implementation timelines and scope for PFAS drinking water compliance obligations.