EPA Defends Data, Methods Used To Derive Aquatic Life Criteria For PFAS

EPA is defending the way it derived its newly finalized aquatic life water quality criteria for two PFAS and “benchmarks” for eight others, disagreeing with comments from state regulators that largely questioned the toxicity data and technical approaches the agency used, as well as the lack of consideration of PFAS precursors and mixtures. EPA released acute and chronic freshwater criteria, along with acute saltwater benchmarks, for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) -- the two most studied per-...