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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PFAS

Per- and Polyfluoroalkyl substances (PFAS), sometimes called “forever chemicals,” are rising in public awareness, government regulation and related litigation. Companies that currently use or historically used or manufactured products containing PFAS are subject to increasing regulation and potential liability associated with the use, the impact on the environment, reporting and disposal of PFAS. Duane Morris’ dedicated group of professionals monitor, analyze and counsel clients on various aspects of PFAS, including companies who are developing technology to capture and eradicate PFAS from water and solids.