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

EPA issued a proposed rule under SDWA to rescind the 2024 PFAS NPDWR regulatory determinations and remove related regulatory provisions that are specific to PFHxS, PFNA, HFPO‑DA (GenX), and the Hazard Index mixture requirement (PFHxS + PFNA + HFPO‑DA + PFBS). The proposal includes a written comment period (stated as 60 days after Federal Register publication) and schedules a virtual public hearing for July 7, 2026 (EPA page also notes pre-registration by July 1, 2026). Compliance teams at water utilities and affected stakeholders should track this rulemaking because it could remove federal monitoring/compliance obligations tied to these PFAS/Hazard Index elements if finalized, changing sampling plans, treatment planning, and reporting expectations.