EPA proposes rescinding SDWA regulatory determinations and removing NPDWR provisions for PFHxS, PFNA, HFPO‑DA (GenX) and Hazard Index mixture (incl. PFBS)

EPA released a proposed rule to rescind the Safe Drinking Water Act regulatory determinations and remove associated National Primary Drinking Water Regulation (NPDWR) provisions for PFHxS, PFNA, HFPO‑DA (GenX), and the Hazard Index mixture (PFHxS + PFNA + HFPO‑DA + PFBS). If finalized, this would eliminate the monitoring/compliance obligations tied specifically to these contaminants under the 2024 PFAS drinking water rule, while (per EPA) not affecting PFOA/PFOS provisions. EPA indicates a 60‑day public comment period will run after Federal Register publication and the agency has scheduled a virtual public hearing for July 7, 2026 (registration details on EPA’s page).