EPA announces intent to keep PFOA/PFOS MCLs while pursuing rulemaking to extend compliance timeline and reconsider other PFAS determinations in the NPDWR

EPA announced it will keep maximum contaminant levels (MCLs) for PFOA and PFOS under the PFAS National Primary Drinking Water Regulation (NPDWR), while signaling planned rulemaking actions to modify implementation and scope. EPA states it plans a rulemaking to extend the compliance date for PFOA/PFOS and also intends to rescind and reconsider determinations/regulations for PFHxS, PFNA, HFPO‑DA (GenX) and the Hazard Index mixture approach (PFHxS, PFNA, HFPO‑DA, PFBS). For compliance teams at public water systems and impacted supply chains, this indicates impending changes to compliance planning and potential changes to which PFAS are regulated under the federal drinking water standards; specific new compliance dates are described as intended/planned rather than finalized in the announcement.