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Auto emission standards

Mercedes-Benz Emissions Litigation

A district court dismissed a class action lawsuit against an automobile company for allegedly misleading consumers into purchasing certain diesel vehicles by misrepresenting their environmental impact. The class of consumers alleged...

Kansas v. Environmental Protection Agency

The D.C. Circuit, in an unpublished opinion, dismissed a petition challenging an EPA computer model that states must use to estimate motor vehicle emissions when developing their strategies to comply with the CAA. Kansas and Nebraska,...

Energy Future Coalition v. Environmental Protection Agency

The D.C. Circuit upheld an EPA regulation that requires automobile manufacturers to use "commercially available" fuel when testing the emissions of new vehicles under the CAA. Several producers of E30, a fuel that contains 30% ethanol,...

Medical Advocates for Healthy Air v. U.S. Environmental Protection Agency

The Ninth Circuit denied a petition for review challenging EPA's approval of a revision to California's SIP that authorized the San Joaquin Valley air pollution control district to impose fees on mobile sources of pollution—primarily...

Delta Construction Co. v. Environmental Protection Agency

The D.C. Circuit dismissed petitions challenging EPA's and the National Highway Traffic Safety Administration's (NHTSA's) coordinated rules governing the greenhouse gas emissions and fuel economy of cars and trucks. One group of...

United States v. Volvo Powertrain Corp.

The D.C. Circuit upheld a $72 million judgment against an automobile manufacturer for violating a consent decree requiring certain model year 2005 engines to comply with EPA’s model-year 2006 nitrogen oxide (NOx) emissions standard. In...

American Road & Transportation Builders Ass'n v. Environmental Protection Agency

The D.C. Circuit denied a road building association's petition for review challenging EPA's CAA §209(e) regulations, which preempt certain state regulation of nonroad engines. In general, §209(e) preemption reaches nationwide....

Daimler Trucks North America LLC v. Environmental Protection Agency

The D.C. Circuit vacated an EPA rule establishing nonconformance penalties (NCPs) for on-highway, heavy-duty diesel engines. NCPs are intended to protect "technological laggards" by allowing them to pay a penalty for engines temporarily...

Daimler Trucks North America LLC v. Environmental Protection Agency

The D.C. Circuit dismissed as moot truck engine manufacturers' lawsuit challenging four certificates of conformity EPA issued to another engine manufacturer pursuant to an interim final rule that allowed certificates to be issued to...

American Road & Transportation Builders v. Environmental Protection Agency

The D.C. Circuit dismissed a road building association's lawsuit challenging EPA regulations for nonroad engines and vehicles. The regulations pertain to CAA §209(e), which preempts certain state regulation of nonroad engines. The...