On October 29, 2021, the U.S. Supreme Court granted certiorari in West Virginia v. Environmental Protection Agency, a petition filed by several states and coal companies attacking the U.S. Environmental Protection Agency's (EPA’s) regulatory authority under the Clean Air Act (CAA). The Court’s holding in this case would determine EPA’s continued ability to use the CAA—including the national ambient air quality standard (NAAQS) program—as a climate change tool.

Superfund practitioners are waiting to see whether the U.S. Environmental Protection Agency (EPA) will designate perfluorooctanoic acid and perfluorooctane sulfonate, two chemicals in the per- and polyfluoroalkyl substances (PFAS) group, as CERCLA hazardous substances. Such a designation may lead to selected remedies being modified and further work being required at Superfund sites where remedies were believed to be complete. This Article explores potential future liability by reviewing provisions of the 2021 Remedial Design/Remedial Action (RD/RA) Model Consent Decree.