Maine Joins States Setting PFAS Drinking Water Limits Before EPA

Maine has joined the growing number of states setting drinking water limits for “forever chemicals” ahead of national standards.

Gov. Janet T. Mills (D) signed a law setting a drinking water maximum contaminant level, or MCLs, of 20 parts per trillion (ppt) for one or more of six per- and polyfluoroalkyl substances, or PFAS: perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), perfluorohexane sulfonic acid, (PFHxS), perfluorononanoic acid (PFNA), perfluoroheptanoic acid (PFHpA), and perfluorodecanoic acid (PFDA).

That compares to the Environmental Protection Agency’s non-enforceable health advisory of 70 ppt for PFOA, PFOS, or a combination of those two.

Maine joins at ...