The court holds that the U.S. Environmental Protection Agency's (EPA's) approval of Georgia's state implementation plan (SIP) mooted environmental groups' claims that Atlanta…

The court grants an environmental group's motion for partial summary judgment against Pennsylvania officials for failing to implement the state-enhanced vehicle inspection and maintenance (I/…

The court holds that the Secretary of the Pennsylvania Department of Transportation and the Secretary of the Pennsylvania Department of Environmental Protection violated the Clean Air Act (CAA) by…

The court denies a petition for review seeking reversal of the U.S. Environmental Protection Agency (EPA) Administrator's decision not to object to a state agency's determination that…

The court holds that the U.S. Environmental Protection Agency (EPA) did not abuse its discretion or act arbitrarily or capriciously in invalidating a state-granted prevention of significant…

The court holds that a gas and electric company violated the Clean Air Act (CAA) by failing to obtain a preconstruction permit before making modifications to its facility even though there were no…

The court vacates the U.S. Environmental Protection Agency's (EPA's) approval of the revised ozone state implementation plans (SIPs) for the Washington, D.C., Metropolitan Area (…

The court denies an industry association's petition to review the U.S. Environmental Protection Agency's (EPA's) denial of the association's Clean Air Act (CAA) §112(b)(3)…

The court holds that the best available retrofit technology (BART) provisions of the U.S. Environmental Protection Agency's (EPA's) regional haze rule violate the Clean Air Act (CAA),…

The U.S. Court of Appeals for the District of Columbia Circuit denies petitioners' challenge to a U.S. Environmental Protection Agency (EPA) rule requiring drastic reductions in exhaust…