The Third Circuit denies an organization of manufacturers' and local governments' petition for review of the U.S. Environmental Protection Agency's (EPA's) denial of Pennsylvania's request to redesignate the Pittsburgh-Beaver Valley area from nonattainment to attainment status for ozone under the Cl...

The court denies most of oil companies' motions to dismiss in a class action suit brought by individual well owners claiming that the companies knowingly caused methyl tertiary butyl ether (MTBE) contamination of their groundwater. The court first holds that the claims of several of the class partic...

The Ninth Circuit held that the U.S. Environmental Protection Agency (EPA) did not act arbitrarily, capriciously, or contrary to law when it granted Nevada's request to split one of its clean air areas into two. Contrary to an environmental group's claim, the presence and operation of a mine in the ...

The court remanded portions of a 2002 U.S. Environmental Protection Agency (EPA) rule interpreting when a major stationary source undertakes a "modification," thereby triggering the Clean Air Act's new source review (NSR) requirements. EPA erred in promulgating the clean unit applicability test, whi...

The court affirms a district court's grant of summary judgment to the Tennessee Valley Authority (TVA) on environmental groups' request for civil penalties and on its claim as to violations of the Clean Air Act's (CAA's) 20% opacity limitation occurring before May 20, 1999, but it reversed summary j...

The court reverses the dismissal of an individual's complaint against his employer under the Clean Air Act's (CAA's) whistleblower provision. The U.S. Department of Labor's Administrative Review Board (ARB) dismissed the complaint reasoning that the individual did not engage in a protected activity ...

A court partially grants the U.S. Environmental Protection Agency's (EPA's) and individuals' motions to dismiss a class action suit stemming from plaintiffs' exposure to hazardous substances in the interior of their residences, schools, and workplaces as a result of the dust and debris released from...

The court denies a petition for review seeking reversal of the U.S. Environmental Protection Agency (EPA) Administrator's decision not to object to a state agency's determination that the heightened permitting requirements of the prevention of significant deterioration (PSD) program do not apply to ...

The court vacates a district court decision that the U.S. Environmental Protection Agency (EPA) violated its statutory obligations under the Radon Gas and Indoor Air Quality Act (Radon Act) by issuing a report that analyzed the effects of secondhand smoke on human health and categorized secondhand s...

The court affirms a district court holding that the Clean Air Act (CAA) does not preempt California's ban of the use of methyl tertiary butyl ether (MTBE) in oxygenated fuel. CAA §211(c)(4)(A) preempts state regulation of fuel for purposes of motor vehicle emissions, but California is exempt fr...