EPA proposes rescinding NPDWR provisions for PFHxS, PFNA, HFPO‑DA (GenX) and Hazard Index mixtures (incl. PFBS); hearing July 7, 2026

EPA published a proposed rule under the Safe Drinking Water Act to rescind regulatory determinations and remove related provisions of the 2024 PFAS NPDWR for PFHxS, PFNA, HFPO‑DA (GenX), and Hazard Index mixtures (PFHxS + PFNA + HFPO‑DA + PFBS). EPA indicates the proposal would not affect the PFOA/PFOS portions of the NPDWR. EPA states there will be a 60-day written comment period after Federal Register publication and a virtual public hearing scheduled for July 7, 2026 (with pre-registration by July 1, 2026). Compliance teams at drinking water systems and supporting suppliers/consultants should track this rulemaking because it could remove monitoring/treatment/compliance obligations for these PFAS constituents if finalized.