Clean Air Act (CAA)

The D.C. Circuit denied a challenge to EPA's 2015 rule updating the standards under which the Agency audits wood-burning heaters' compliance with CAA emissions limits. An industry group…

The Ninth Circuit granted in part and denied in part a petition to review EPA's final rule approving California's SIP for meeting the air quality standard for ozone in the San Joaquin…

The Eighth Circuit affirmed in part and reversed in part a district court ruling in an ongoing enforcement suit concerning air pollution at a utility company's coal-fired power plant in…

A Minnesota appellate court remanded a challenge to the Minnesota Pollution Control Agency's (MPCA's) grant of an air emissions permit for a proposed copper-nickel mine in northern…

The D.C. Circuit granted in part environmental groups' petition to review EPA's 2019 rule setting annual renewable fuel volume levels under the Renewable Fuel Standard (RFS) program. The…

The D.C. Circuit vacated in part EPA's 2019 rule lifting seasonal restrictions on the sale of higher-ethanol fuel. Petroleum industry groups challenged a specific section of the rule, in…

The Ohio Supreme Court affirmed an appellate court ruling in a lawsuit concerning Volkswagen’s efforts to cheat U.S. diesel emissions tests. Ohio sued the company, arguing its post-sale tampering…

The Third Circuit affirmed dismissal of a lawsuit concerning reporting requirements for emissions following fires at a steel facility near Pittsburgh. An environmental group argued the facility…

The Eighth Circuit affirmed, 2-1, summary judgment for a mining company in a lawsuit concerning the company's operation of a coal mine in North Dakota. Owners of an adjacent ranch argued the…

A district court adopted a magistrate judge's recommendation and granted an environmental group's motion for partial summary judgment in a lawsuit concerning particulate matter emissions…