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 ...