On Feb. 20, 2020, roughly one year after announcing its comprehensive per- and polyfluoroalkyl substances (PFAS) action plan, the Environmental Protection Agency (EPA) issued a preliminary regulatory determination under the Safe Drinking Water Act (SDWA) for the two most-studied of the chemicals, perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA). This is the initial step
