American Lung Association v. EPA

On October 1, 2026, New York and 20 other states, the District of Columbia, Chicago, the City and County of Boulder, and New York City filed a petition for review challenging the repeal. The D.C. Circuit consolidated their case with the public health and environmental organizations’ case.

On September 17, 2026, six public health and environmental organizations filed a petition for review challenging the U.S. Environmental Protection Agency’s final rule entitled “Partial Repeal of the Carbon Pollution Standards for Fossil Fuel-Fired Electric Generating Units.” The rule repealed emission guidelines adopted in 2024 for existing fossil fuel-fired steam generating units, as well as carbon capture and sequestration/storage (CCS)-based standards for coal-fired steam generating units undertaking a large modification and the CCS-based standards for new base load stationary combustion turbines.