(May 26, 2022, 1:43 PM EDT) -- CHARLESTON, S.C. — The commonwealth of Massachusetts on May 25 sued the makers of the firefighting agent known as aqueous film forming foam (AFFF) in South Carolina federal court, contending that they are liable for “tortious and unlawfully deceptive actions” that have contaminated groundwater in the commonwealth because they continued to manufacture AFFF’s ingredients, per- and polyfluoroalkyl substances (PFAS), despite understanding their toxicity....