In April 2024, EPA designated perfluorooctanoic acid (“PFOA”) and perfluorooctanesulfonic acid (“PFOS”) as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (“CERCLA”). As previously discussed in Re:Torts, industry groups challenged the designation, arguing that EPA misread the phrase “may present substantial danger” as requiring only a “possibility” of harm. The groups also argued EPA gave inadequate notice of its cost-benefit methodology and acted arbitrarily and capriciously.
