THE ENVIRONMENTAL PROTECTION AGENCY has asked Chemours to test water near its plant in West Virginia for the presence of the chemical GenX. In a January 11 letter to Andrew Hartten, Chemours’ principal project manager for corporate remediation, Kate McManus, acting director of the EPA’s water protection division, noted that GenX has already “been detected in three on-site production wells and one on-site drinking water well” at the company’s factory in West Virginia, which is known as Washington Works.

McManus also referred to GenX contamination near the Chemours factory in Fayetteville, North Carolina, where DuPont and its spinoff Chemours dumped approximately 200,000 pounds of GenX into the Cape Fear River since 1980, according to Detlef Knappe, a North Carolina State University professor who has studied the contamination. In that time, more than 200,000 people have been exposed to GenX in their drinking water.

“EPA is concerned that drinking water wells in the vicinity of the Washington Works facility may similarly be contaminated by GenX,” the letter explained.

DuPont introduced GenX in 2009 to replace PFOA, also known as C8, a chemical it had used for decades in North Carolina, West Virginia, and other locations to make Teflon and other products. Like GenX, PFOA escaped the West Virginia plant and seeped into local drinking water. The contamination — and the fact that DuPont executives knew about it and hid their knowledge — set off a mammoth class-action suit, which DuPont settled for $671 million.

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