The court holds that a state environmental agency's enforcement actions against a petroleum company preclude a citizen suit against the company for Clean Air Act (CAA) violations. The court…

The court holds that although ore from a smelter's processing facility is a hazardous substance under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA),…

The court affirms the U.S. Environmental Protection Agency's (EPA's) decision to redesignate the Cleveland-Akron-Lorain, Ohio, area as a Clean Air Act (CAA) attainment area for ozone.…

The Court holds that an environmental group's challenge to a U.S. Forest Service land and resource management plan (LRMP) for Wayne National Forest in Ohio is not yet ripe for review. The…

The court upholds the U.S. Environmental Protection Agency's (EPA's) decision to grant California a Clean Air Act (CAA) §209(b) waiver allowing the state to enforce its own on-board…

The court holds that the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) preempts a citizens group's private state-law nuisance action against a contractor…

The court holds that the Federal Aviation Administration's (FAA's) approval of the expansion of Burbank-Glendale-Pasadena Airport does not violate the National Environmental Policy Act (…

The court holds that a municipality is liable for diverting raw sewage from its treatment facilities and for discharging pollutants that exceeded allowable effluent limitations in violation of its…

The court upholds a U.S. Environmental Protection Agency (EPA) rule that revised and established nitrogen oxide (NOx) emission limits for Group 1, Phase II electric utility boilers as well as…

The court holds that the U.S. Environmental Protection Agency (EPA) failed to explain adequately why the physical effects felt by some asthmatics from exposure to short-term, high-level sulfur…