On April 8, 2024, EPA Administrator Michael Regan signed a final rule setting limits for six PFAS in drinking water. The rule, which will become effective 60 days after publication in the Federal Register, establishes maximum contaminant levels (MCLs) for PFOA (4 ppt), PFOS (4ppt), PFHxS (10 ppt), PFNA (10 ppt), HFPO-DA (10 ppt) and will apply a hazard index MCL of 1 to mixtures containing two or more of PFHxS, PFNA, HFPO-DA and PFBS. It will also preempt any state standards that are less stringent than the new EPA rule.
Read the full Alert here.