The D.C. Circuit dismissed Arizona's objection to a consent decree that established a timeline for EPA to approve a SIP, or promulgate a federal implementation plan (FIP), that would meet the…

A district court dismissed Native American and environmental groups' CAA citizen suit asking the court to order EPA to issue a final rule that establishes best available retrofit technology (…

The Michigan Court of Appeals, in an unpublished opinion, upheld the state environmental agency's decision to issue two permits authorizing modifications at a coal-fired power plant. The…

The D.C. Circuit dismissed as moot truck engine manufacturers' lawsuit challenging four certificates of conformity EPA issued to another engine manufacturer pursuant to an interim final rule…

A district court denied industry groups' motion to intervene in a CAA citizen suit concerning EPA's alleged failure to review the ozone NAAQS in a timely manner. The underlying lawsuit…

The Supreme Court of Kansas reversed and remanded the Kansas Department of Health and Environment's decision to issue a prevention of significant deterioration (PSD) permit to a power company…

The Eighth Circuit vacated and remanded EPA's best available retrofit technology (BART) determination for a large power plant in North Dakota, but otherwise upheld EPA's partial…

The Eleventh Circuit reversed a lower court decision excluding the testimony of two expert witnesses in the government's case against a power company for making major modifications at three…

The Fifth Circuit held that it lacked jurisdiction to review petitions challenging EPA's objection to three CAA Title V permits issued by the Louisiana Department of Environmental Quality for…

The Third Circuit affirmed a lower court decision dismissing the U.S. government's lawsuit against the current and former owners of a coal-fired power plant in Indiana County, Pennsylvania,…