Overview On May 18, 2026, the Environmental Protection Agency (EPA) announced two proposed PFAS rules that represent a significant rollback of the Biden-era PFAS regulatory framework.1 Public comments on both new rules close on July 20, with a virtual public hearing on July 7.2 The Biden EPA promulgated PFAS regulations in April of 2024 that set Maximum Contaminant Levels (MCLs) for PFOA and PFOS at 4 parts per trillion (ppt) and MCLs for PFHxS, PFNA, HFPO-DA (GenX) at 10 ppt, as well as a...