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MassDEP issues guidance for water suppliers on EPA PFAS proposed rules
PFAS MassachusettsMassachusetts Department of Environmental Protection (MassDEP)Massachusetts
Announced
Jun 17, 2026
Description
MassDEP published a Q&A fact sheet for public water suppliers clarifying how EPA's proposed PFAS rescission rule and compliance extension would affect Massachusetts water systems. The guidance confirms Massachusetts' PFAS6 MCL of 20 ppt combined (for PFOS, PFOA, PFHxS, PFNA, PFHpA, PFDA) remains in effect regardless of federal changes, and explains options for seeking PFOA/PFOS compliance deadline exemptions through 2031. The guidance notes that most Massachusetts PFAS exceedances result from PFAS6 levels above the state's 20 ppt standard, demonstrating Massachusetts' standards are often more protective than federal limits.
Sources
Key Findings
MassDEP issues guidance for water suppliers on EPA PFAS proposed rules
6-17 -202 6 > MassDEP - Drinking Water Program - One Winter Street - Boston, MA 02108 > https://www.mass.gov/drinking-water-program 1 # M a s s D E P F a c t S h e e t # Per- and Polyfluoroalkyl Substances (PFAS) in Public Drinking Water Supplies – Questions and Answers for PWS Introduction This Q&A provides answers to questions about Per- and Polyfluoroalkyl Substances (PFAS) and combines MassDEP PFAS Q&As and facts
MassDEP issues guidance for water suppliers on EPA PFAS proposed rules
n Massachusetts Department of Environmental Protection * search in Executive Office of Energy and Environmental Affairs Search 1. [](https://www.mass.gov/) 2. [MassDEP](https://www.mass.gov/orgs/massachusetts-department-of-environmental-protection) 3. [Drinking water health & safety](https://www.mass.gov/drinking-water-health-safety) 4. PFAS in Drinking Water 5. …This page is located more than 3 levels deep within a