Today, the U.S. Environmental Protection Agency (EPA) announced that Administrator Regan signed a proposed rule to designate two of the most widely studied per- and polyfluoroalkyl substances (PFAS) as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The proposed designation for PFOA and PFOS, if and when finalized, would provide EPA with powerful new tools to clean up existing contamination in hot spots across the country, while seeking to hold those responsible for the releases financially accountable. The designation would also increase EPA’s reporting and information gathering authorities as the agency continues to build its database of PFAS contamination.