Deadline UpdateLiveReporting Deadline
EPA grants Massachusetts primacy extension to April 2028 for PFAS drinking water standards
Safe Drinking Water Act (SDWA) — PFAS National Primary Drinking Water Regulation (NPDWR) — Massachusetts ImplementationU.S. Environmental Protection Agency (EPA) / Massachusetts Department of Environmental Protection (MassDEP)Massachusetts, USA
Announced
Mar 16, 2026
Effective
Apr 26, 2028
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.
Key Findings
EPA grants Massachusetts primacy extension to April 2028 for PFAS drinking water standards
* Official websites use .mass.gov A .mass.gov website belongs to an official government organization in Massachusetts. * Secure websites use HTTPS certificate A lock icon ( ) or https:// means you've safely connected to the official website. Share sensitive information only on official, secure websites. [ Mass.gov](/)