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Oxygenated Fuels Ass'n v. Davis

The court affirms a district court holding that the Clean Air Act (CAA) does not preempt California's ban of the use of methyl tertiary butyl ether (MTBE) in oxygenated fuel. CAA §211(c)(4)(A) preempts state regulation of fuel for purposes of motor vehicle emissions, but California is exempt fr...

Reno-Sparks Indian Colony v. EPA

The court held that a 2002 U.S. Environmental Protection Agency (EPA) rule specifying that Nevada was divided into more than 250 baseline areas for the Clean Air Act (CAA) prevention of significant deterioration (PSD) program was not arbitrary or capricious. Based on an ambiguous 1991 EPA regulation...

Clean Air Mkts. Group v. Pataki

The court affirms a district court decision that New York Air Pollution Mitigation Law §66-k is preempted by the Clean Air Act (CAA) Title IV cap-and-trade system and violates the Supremacy Clause of the U.S. Constitution. Section 66-k requires the assessment of an air pollution mitigation offs...

United States v. Ohio Edison Co.

The court holds that an electric utility violated the Clean Air Act (CAA) when it completed 11 construction activities that modified a coal-fired electric-generating facility without first calculating post-construction emissions and obtaining preconstruction CAA prevention of significant deteriorati...

Bayview Hunters Point Community Advocates v. Metropolitan Transp. Comm'n

The court holds that a local transportation control measure, adopted as part of California's state implementation plan to attain federal air quality standards in the San Francisco Bay Area, does not impose an enforceable obligation on the local transportation commission to increase public transit ri...

Engine Mfrs. Ass'n v. South Coast Air Quality Management Dist.

The U.S. Supreme Court held that certain aspects of local fleet rules do not escape preemption under CAA §209(a) simply because they address the purchase of vehicles rather than their manufacture or sale. The fleet rules prohibit the purchase or lease of vehicles by fleet operators that do not ...

Greenbaum v. EPA

The Sixth Circuit upheld EPA's redesignation of Cleveland, Ohio, from nonattainment to attainment for particulate matter under CAA §107(d)(3)(E). An environmental group argued that EPA illegally waived statutory requirements when it redesignated the area to attainment by not fully approving the...

Alliance for Clean Coal v. Craig

The court holds that the Illinois Coal Act violates the Commerce Clause of the U.S. Constitution. The Act requires public utilities to devise Clean Air Act (CAA) compliance plans and present them to the Illinois Commerce Commission for approval. The Act requires the utilities and the Commission to t...

Espinosa v. Roswell Tower, Inc.

The court holds that New Mexico's environmental agency may not bring an enforcement action in federal court to seek federalpenalties under §113 of the Clean Air Act (CAA) for violations of its state implementation plan (SIP) after successfully prosecuting a state court enforcement action against th...

Natural Resources Defense Council v. Browner

The court upholds a U.S. Environmental Protection Agency (EPA) rule that allows a state to stop Clean Air Act (CAA) §179(a)'s 18-month countdown to imposition of sanctions when it is triggered by an EPA finding that the state failed to submit a complete state implementation plan (SIP). Under the ru...