Industry groups said the E.P.A. had exceeded its authority in requiring the drinking-water cleanup. The chemicals, known as PFAS, are linked to cancer and health risks. Industry groups said the E.P.A. had exceeded its authority in requiring the drinking-water cleanup. The chemicals, known as PFAS, are linked to cancer and health risks. Global Warming, Greenhouse Gas Emissions, Water Pollution, Hazardous and Toxic Substances, Chemicals, Water, PFAS (Per- and Polyfluoroalkyl Substances), Ethics and Official Misconduct, Suits and Litigation (Civil), Factories and Manufacturing, Environment, Pollution NYT > Science