A district court held that EPA failed to set emissions standards for hazardous air pollutants under CAA §112(c)(6) in violation of prior court orders. In 2006 and 2011, the court ordered EPA to…

The D.C. Circuit vacated a portion of EPA's 2013 rule regulating air emissions from Portland cement kilns. The court concluded that the emission-related portions of the rule are permissible…

The D.C. Circuit upheld the emission standards EPA promulgated in 2012 for mercury and other listed hazardous air pollutants emitted by coal- and oil-fired electric utility steam generating units…

The D.C. Circuit denied petitions challenging EPA's revised NESHAPs for primary lead processing operations. Despite petitioners' argument to the contrary, EPA's use of the lead…

The D.C. Circuit upheld EPA's revised NESHAPs for secondary lead smelting facilities. In 2012, acting pursuant to CAA §§112(d)(6) and 112(f)(2), EPA revised the 1995 emissions standards for…

The D.C. Circuit upheld an EPA rule that added the gold mine ore processing and production area source category to the list of source categories to be regulated under CAA §112(c)(6). CAA §112(c)(6…

The D.C. Circuit held that EPA's determination that it completed sufficient standards to meet CAA §112(c)(6)'s 90% requirement for hazardous air pollutants is a legislative rulemaking…

A district court held that utilities violated CAA §112(g) by upgrading an existing power plant in Lamar, Colorado, from a natural gas-fired plant into a coal-fired one without receiving a maximum…

The Tenth Circuit dismissed as moot an environmental group's CAA citizen suit against an energy company for building a new coal-fired power plant in Pueblo, Colorado, without a valid…

A district court held that an environmental group may go forward with its CAA citizen suit against EPA for failing to promulgate by November 15, 2000, regulations to reduce hazardous air…