EPA Signs Final Rule to Regulate Six PFAS in Drinking Water

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 (4 ppt), PFHxS (10 ppt), PFNA (10 ppt) and HFPO-DA (10 ppt), and will use a hazard index MCL of 1 to regulate mixtures of PFHxS, PFNA, HFPO-DA and PFBS. The rule will preempt any state standards that are less stringent than the new EPA rule.

The full Alert on this new rule is available HERE.

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