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Maryland has filed suit against W.L. Gore & Associates (Gore), a downstream user of PFAS-containing materials, alleging that its manufacturing processes contributed to PFAS contamination through its use of polytetrafluoroethylene (PTFE), including Teflon®-branded PTFE. The complaint asserts that Gore sourced PTFE from E.I. DuPont de Nemours and Company (DuPont) and Chemours Company—two PFAS manufacturers already facing lawsuits from Maryland—and used it to manufacture expanded PTFE (ePTFE), a microporous material incorporated into various products, including GORE-TEX® breathable, water-resistant fabrics used in outdoor and athletic apparel.

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In a move that signals potential policy shifts under the new administration, the U.S. Court of Appeals for the District of Columbia Circuit granted EPA’s requests for 60-day stays in two high-profile cases challenging Biden-era PFAS regulations. The stays, issued on February 7 and February 25, 2025, temporarily pause litigation over EPA’s maximum contaminant levels (MCLs) for several per- and polyfluoroalkyl substances (PFAS) under the Safe Drinking Water Act and the agency’s designation of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Both stays were requested by the EPA and its new administrator, Lee Zeldin, as the second Trump administration appears to be reassessing its approach to PFAS regulation. The move raises questions about whether the administration will revise or rescind these regulations.

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On Friday, August 26, 2022, the U.S. Environmental Protection Agency (EPA) released a pre-publication notice of a long-awaited proposed rule to designate two of the most-studied per- and polyfluoroalkyl substances (PFAS)—perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS)—as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). In an accompanying statement, EPA indicated that the proposed rule will be published in the Federal Register within the next few weeks. That publication will commence a 60-day public comment period. EPA appears to be targeting final rule promulgation by Summer 2023.

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The U.S. Environmental Protection Agency (EPA) has taken another step toward regulating perfluoroalkyl substances (PFAS). Specifically, on February 20, 2020, the EPA issued a pre-publication version of a Supplemental Proposed Rule that could affect a host of businesses that traditionally have not had to concern themselves with Toxic Substances Control Act (TSCA) compliance and enforcement. The proposal concerns a subcategory of PFAS known as “Long-Chain Perfluoroalkyl Carboxylates and Perfluoroalkyl Sulfonates” (collectively, LCPFAC) under TSCA. Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), two of the most problematic PFAS substances, are among the chemicals that would be regulated.

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