The D.C. Circuit denied environmental groups' petition to review a 2016 rule that EPA uses to determine whether an event caused by recurring activity is "exceptional" and thus exempt from a state's emissions report. The groups argued that EPA misread the definition of "natural event" under the excep...

The Third Circuit vacated a lower court's dismissal of a company's claim that the Delaware River Basin Commission did not have authority to review the company's proposed fracking activities. The company argued that the Commission lacked authority under the Delaware River Basin Compact to review and ...

The D.C. Circuit vacated a license renewal that FERC granted for a power plant on the Coosa River. Environmental groups argued that the agency violated the Federal Power Act, NEPA, and the ESA when it issued the power company's license. The appellate court agreed, finding that the EA and biological ...

The Ninth Circuit affirmed a district court's denial of a car owner's motion to intervene in DOJ's case against a German automaker to resolve alleged CAA violations. The owner argued that DOJ's settlement with the automaker violated Virginia's SIP by not requiring all affected vehicles to be bought ...

The D.C. Circuit denied Delaware's petition to review EPA's decision granting the Philadelphia area an extra year to comply with national ground-level ozone standards. Delaware argued that the Agency's extension violated the CAA because not all four states in the Philadelphia area applied for an ext...

The D.C. Circuit denied petitions from industry groups challenging EPA's new kiln air emissions standards for brick and clay manufacturers, and largely granted petitions from environmental groups who argued the standards were not strict enough to protect human health. Industry groups argued that the...