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…

The D.C. Circuit denied petitions for review challenging EPA's disapproval of a revision to Kansas' proposed SIP revision for the 2006 fine particulate matter (PM2.5) NAAQS. EPA…

The Ninth Circuit held that EPA violated the CAA when it approved California SIPs concerning NAAQS for ozone and fine particulate matter in the San Joaquin Valley. The SIPs relied on state-adopted…

The Ninth Circuit denied community groups' petition for review challenging EPA's approval of revisions to California's SIP concerning air emissions from pesticides, known as the…