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flag Maine lowers PFAS limits in drinking water to 10 ppt, with stricter caps on PFOA and PFOS, effective 2027–2029.

flag Maine has adopted stricter PFAS limits in drinking water, aligning with new federal standards, lowering the combined limit for six PFAS chemicals to 10 parts per trillion and setting individual caps of 4 ppt for PFOA and PFOS—down from 20 ppt. flag The rule, effective in phases from 2027 to 2029, requires public water systems to treat water or find cleaner sources, with compliance costs estimated at $50 million, partly funded by federal loans. flag Systems exceeding limits may face daily fines of up to $2,000. flag The rule adds GenX and PFBS to regulated chemicals due to health concerns, while PFDA and PFHpA will no longer count toward the cap but must still be monitored. flag About half of Maine’s residents rely on unregulated private wells. flag The change aims to reduce risks linked to cancer, immune issues, and developmental problems.

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