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…

A district court ordered Oklahoma to file a brief by July 16 explaining why the court should have jurisdiction over the state's lawsuit challenging EPA's proposed "Clean Power Plan…

The U.S. Supreme Court reversed and remanded EPA's rule limiting hazardous air pollutant emissions from power plants, holding that the Agency interpreted CAA §112(n)(1)(A) unreasonably when…

The Ninth Circuit denied petitions for review challenging EPA's promulgation of 40 C.F.R. §52.245, a regulation that revised the scope of a previous EPA decision, after the Agency determined…

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…

The D.C. Circuit dismissed petitions for review challenging EPA's anticipated rule restricting carbon dioxide (CO2) emissions from existing power plants. On June 18, 2014, EPA proposed a rule…

The Ninth Circuit granted in part and denied in part petitions for review challenging EPA's federal implementation plan to reduce regional haze at two power plants in Montana. The owner and…

The D.C. Circuit denied several petitions for review challenging aspects of an EPA rule that provides procedures for classifying non-hazardous secondary materials as RCRA "solid waste"…

The D.C. Circuit denied petitions for review of EPA decisions regarding nonattainment designations under the 2008 ozone NAAQS. Several states, counties, industrial entities, and environmental…

The D.C. Circuit vacated and remanded an EPA decision denying an oil refinery's request to extend its exemption from the Agency's renewable fuels program. The program requires oil…