(September 15, 2023, 1:43 PM EDT) -- CHARLESTON, S.C. — A water authority has sued the makers of per- and polyfluoroalkyl substances (PFAS), which are used as ingredients in the firefighting substance aqueous film forming foam (AFFF), in South Carolina federal court seeking to recover the costs of protecting and restoring its drinking water from PFAS contamination and arguing that the defendants knew that the chemicals are toxic....