Clear PFAS Definition Needed by EPA, States Tell Agency (1)

April 13, 2021, 7:59 PM; Updated: April 13, 2021, 10:33 PM

The EPA doesn’t have a single agency-wide definition of per- and polyfluoroalkyl substances, or PFAS, which is prompting state officials to push it to adopt one.

Different Environmental Protection Agency offices are using different working definitions of PFAS, Catherine Aubee, an EPA pesticide registration officer, told state officials during a two-day online pesticide conference.

“We’re trying to see what they mean and see if we can reach a common definition for different programs and what it means for pesticides,” she said.

An agency “master list” of PFAS compounds contains more than 9,200 chemicals, but says: “There is no precisely clear...

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