The Ninth Circuit held that the CAA does not preempt a local air district's adoption and enforcement of rules regulating air emissions from diesel-powered engines. CAA §209(e) expressly…

A district court held that the CAA preempts a city transit employee's negligence and strict liability claims against a company for injuries stemming from diesel exhaust fumes. The…

The Ninth Circuit held that the CAA does not preempt a California air pollution district rule requiring development sites to reduce the amount of pollutants they emit. CAA §209(e)(1) only…

A district court dismissed a county's lawsuit against a railroad company for allowing its locomotive engines to idle in violation of state air pollution law. This case involves railcars, the…

A district court held that the Clean Air Act (CAA) does not preempt a local air district rule that requires developers to reduce nitrogen oxide and particulate matter emissions from their projects…

The Ninth Circuit upheld an injunction enjoining the California Air Resources Board from enforcing state regulations that limit emissions from the auxiliary diesel engines of ocean-going vessels…

The Ninth Circuit affirmed a lower court decision that the Clean Air Act (CAA) does not preempt certain provisions of local "fleet rules" requiring operators to meet specified emission…

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…

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…

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 §…