By Jeffrey Karp, Senior Counsel, and Edward Mahaffey, Legal Research and Writing Attorney

U.S. EPA Announces Proposed Rule to Designate Certain Compounds as CERCLA Hazardous Substances, New Scientific Developments, and Consequences of U.S. EPA’s Drinking Water Health Advisories

Significant new developments regarding per- and polyfluoroalkyl substances (PFAS) contamination have been announced in recent weeks. The headline federal development occurred on August 26, 2022, with the US Environmental Protection Agency’s (EPA) proposal to designate the PFAS compounds perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Also, following the release of new drinking water health advisories by EPA in June 2022, new scientific studies have found that the problem of PFAS contamination is worse than previously believed. But, these studies also have pointed to potential remedial solutions. Although regulation of PFAS has gradually increased at the federal and state levels, the absence of comprehensive federal regulation has continued to engender disputes concerning the cleanup of PFAS contamination.