A district court upheld Oregon's clean fuels program, which seeks to reduce lifecycle emissions of greenhouse gases (GHG) from transportation fuels by 10% over a 10-year period. Trade associations…

The Fifth Circuit reversed an oil company's convictions for violating the CAA and Migratory Bird Treaty Act (MBTA) in connection with its wastewater treatment system at its Corpus Christi refinery…

The Seventh Circuit upheld EPA's approval of revisions to Illinois' SIP, thereby rejecting challenges raised by Indiana. Indiana argued that the relaxation of Illinois' vehicle emissions testing…

The D.C. Circuit, on remand from the U.S. Supreme Court, invalidated EPA's 2014…

The D.C. Circuit denied petitions challenging an EPA regulation that revised the NESHAP for hexavalent chromium, a carcinogenic compound that gets emitted into the air during the chrome-finishing…

A district court held that it lacks jurisdiction over Oklahoma's lawsuit against EPA challenging its proposed emission standards for coal-fired power plants. The state argues that the proposed…

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…

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" to reduce…

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 it…

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 that…