On August 18, 2026, the U.S. Court of Appeals for the D.C. Circuit denied petitions for review of a 2024 EPA rule designating PFOA and PFOS as “hazardous substances” under CERCLA, leaving EPA’s designation in place.
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D.C. Circuit Upholds EPA Rule Designating PFOA and PFOS as CERCLA Hazardous Substances

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