U.S. EPA Issues Final Drinking Water Standards for 6 PFAS Chemicals

On April 10, 2024, U.S. EPA finalized a new National Primary Drinking Water Regulation (NPDWR) establishing legally enforceable levels, Maximum Contaminant Levels (MCLs), for six PFAS in drinking water. PFOA, PFOS, PFHxS, PFNA, and HFPO-DA (Gen-X) as contaminants with individual MCLs, and PFAS mixtures containing at least two or more of PFHxS, PFNA, HFPO-DA, and PFBS using a Hazard Index MCL to account for the combined and co-occurring levels of these PFAS in drinking water. EPA also finalized health-based, non-enforceable Maximum Contaminant Level Goals (MCLGs) for these PFAS.

For additional information see: https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas