EPA proposes rescinding NPDWR determinations/requirements for PFHxS, PFNA, HFPO‑DA (GenX) and Hazard Index mixture provisions

EPA issued a proposed rule to rescind the Safe Drinking Water Act (SDWA) regulatory determinations and remove related provisions in the 2024 PFAS NPDWR for PFHxS, PFNA, HFPO‑DA (GenX chemicals), and Hazard Index mixture-related provisions (mixtures including PFBS alongside PFHxS/PFNA/HFPO‑DA). Compliance teams for drinking-water utilities, primacy agencies, and downstream stakeholders should track the proposal, assess potential changes to monitoring/compliance programs for the affected PFAS/Hazard Index components, and consider submitting comments during the public comment period once published in the Federal Register.