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Sierra Club v. United States Environmental Protection Agency

The Tenth Circuit held that EPA erred in denying an environmental group's petition to review the renewal of a state-issued Title V operating permit for a coal-fired power plant in Utah. The group's petition argued that EPA should object to the renewal because it failed to "assure compliance" with al...

Weymouth v. Massachusetts Department of Environmental Protection

The First Circuit vacated an air permit issued by the Massachusetts Department of Environmental Protection (MDEP) for a proposed natural gas compressor station that is part of a natural gas pipeline connecting the northeastern U.S. and Canada. Nearby municipalities and citizens argued that MDEP impr...

Montana Wildlife Federation v. Bernhardt

A district court vacated BLM's 2018 instruction memorandum (IM) and oil and gas lease sales in Montana and Wyoming issued in reliance on the IM for failing to maintain federal protections for the greater sage-grouse. Environmental groups challenged the IM and lease sales, arguing that they violated ...

Maryland v. Environmental Protection Agency

The D.C. Circuit granted in part and denied in part Delaware's and Maryland's challenges to EPA's denial of their CAA §126(b) petitions requesting that the Agency impose additional limitations on certain upwind sources contributing to the states' nonattainment of ozone NAAQS. Maryland's petition ar...