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Advanced Biofuels Association v. Environmental Protection Agency

The D.C. Circuit upheld EPA's decision to modify the criteria or lower the threshold by which the Agency determined whether to grant small refineries an exemption from the CAA's Renewable Fuel Program. An industry group argued that the...

California v. Environmental Protection Agency

The D.C. Circuit upheld EPA's decision to reconsider greenhouse gas emission standards for model year 2022-2025 vehicles. States and environmental groups argued that EPA violated procedural and substantive requirements imposed by the...

United States v. Ameren Missouri

A district court granted in part a motion to stay its previous order requiring an electric utility company to obtain a PSD permit to address CAA violations at its coal-fired power plant in Festus, Missouri, and to install air pollution...

Sierra Club v. United States Environmental Protection Agency

The Fifth Circuit upheld EPA's approval of Louisiana's SIP for controlling regional haze. Environmental groups challenged the approval of Louisiana's selection of low-sulfur coal over a more effective pollutant control as the best...

New York v. Environmental Protection Agency

The D.C. Circuit vacated EPA's 2018 update to the Cross-State Air Pollution Rule (CSAPR). States and environmental groups argued that EPA violated the CAA by failing to require upwind states to reduce their contribution of ozone...

United States v. Ameren Missouri

A district court ordered an electric utility company to obtain a PSD permit to address CAA violations at its coal-fired power plant in Festus, Missouri. EPA argued that the company increased the risk of negative health impacts and...

Wisconsin v. Environmental Protection Agency

The D.C. Circuit granted in part and denied in part a petition challenging EPA's update to the Cross-State Air Pollution Rule. Environmental groups and Delaware argued that EPA violated the CAA by failing to require upwind states to...

Alon Refining Springs, Inc. v. Environmental Protection Agency

The D.C. Circuit upheld EPA's implementation of its Renewable Fuel Standards Program, which requires transportation fuel sold in the United States to contain a minimum volume of renewable fuels. Some industry groups argued that EPA...

Sierra Club v. Environmental Protection Agency

The D.C. Circuit dismissed a petition to review EPA's order denying an environmental group's objection to renewal of a Title V operating permit for a power plant in Utah. The group objected that the renewal permit incorporated...

Sierra Club v. Environmental Protection Agency

The D.C. Circuit dismissed in part and denied in part a petition to review EPA's 2016 revisions to its ambient air quality monitoring system regulations. An environmental group argued that the revisions violated the CAA by not requiring...

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