EPA grants Massachusetts primacy extension to April 2028 for PFAS drinking water standards

Description

EPA approved MassDEP's request for a Primacy Extension, extending Massachusetts' deadline to promulgate state PFAS drinking water regulations aligned with federal Maximum Contaminant Levels (MCLs) to April 26, 2028. Massachusetts currently enforces a PFAS6 MCL of 20 ppt combined for six PFAS compounds (PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA), while federal standards establish 4 ppt individual limits for PFOA and PFOS. MassDEP will propose amendments to state regulations to be at least as stringent as federal MCLs.

Sources

• Official Per- and Polyfluoroalkyl Substances (PFAS) in Drinking Water | Mass.gov

Key Findings

EPA grants Massachusetts primacy extension to April 2028 for PFAS drinking water standards