The D.C. Circuit dismissed in part and denied in part a petition to review EPA's 2016 revisions to its ambient air quality monitoring system regulations. An environmental group argued that…

The D.C. Circuit denied an electric utility association's petition for review challenging EPA's new source performance standards for steam generating units. The standards—issued via…

The D.C. Circuit denied an environmental group's petition for review of U.S. Environmental Protection Agency (EPA) air quality regulations governing the exclusion of emissions data from state…

The court holds that the U.S. Environmental Protection Agency's (EPA's) adoption of a rule requiring compliance assurance monitoring (CAM) of major emission sources complies with the…