Water safety concerns aren't just in Flint, Mich., these days. Communities in three states in the Northeast have found elevated levels of a suspected carcinogen — perfluorooctanoic acid, or PFOA.
Used to make Teflon, the chemical has contaminated water supplies in New York, New Hampshire and Vermont.
After a four-month ban in the village of Hoosick Falls, N.Y., the New York State Department of Health declared the water safe to drink and cook with again on Wednesday. A temporary filtering system has brought PFOA levels down to nondetectable levels for weeks.