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 the CAA preempts individuals' tort law action against a coal-fired power plant for property damage stemming from the plant's air emissions. In essence, the…

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…

A district court denied a company's motion to dismiss an environmental group's CAA citizen suit against it for building seven compressor stations without first obtaining a nonattainment…

A district court held that reheater replacements at a Louisiana power plant constitute a major modification and do not qualify for the routine maintenance, repair or replacement exception to the…

The D.C. Circuit vacated EPA's transport rule, also known as the Cross-State Air Pollution Rule, which sets sulfur dioxide and nitrogen oxides emissions limits for 28 upwind states based on…

The D.C. Circuit held that trade associations for the engine, petroleum, and food industries lack standing to challenge two EPA decisions approving the introduction of E15—a blend of gasoline and…

The Fifth Circuit vacated EPA's disapproval of Texas's flexible permit program under the CAA. Texas submitted the program to EPA as a revision to its SIP and as a new feature of the…

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…