Abstract
The U.S. Environmental Protection Agency will soon release a toxicity assessment for hexafluoropropylene oxide dimer acid (HFPO-DA), a fluoroether that Chemours’s GenX surfactant hydrolyzes into. That’s according to an EPA official who spoke Sept. 6 at the first-ever congressional hearing on industrial per- and polyfluoroalkyl substances (PFASs). Some of these environmentally persistent chemicals are linked to illnesses, including cancer. HFPO-DA and other PFASs taint more than 100 km of the Cape Fear River downstream of a Chemours facility in Fayetteville, N.C., as well as groundwater around the plant, public drinking water supplies, and private wells. EPA also found the chemical in wells near a Chemours plant outside Parkersburg, W.Va. GenX is the ammonium salt of HFPO-DA. EPA will issue the toxicity assessment for HFPO-DA in the coming weeks, Peter C. Grevatt, director of the agency’s Office of Ground Water & Drinking Water, told the House of Representatives Energy & Commerce
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