A district court ordered EPA to promulgate revised CAA emission standards for nine industrial sectors by October 1, 2021. Environmental groups wanted the overdue rulemakings to be completed within two years, while the Agency requested seven years. The court determined that three and a half years was...

The D.C. Circuit upheld EPA's 2012 regional haze rule, which seeks to restore air quality and visibility in certain national parks and wilderness areas to what they would be under natural conditions. The rule requires states to impose best available retrofit technology (BART) on certain stationary p...

The D.C. Circuit granted in part and denied in part petitions concerning EPA's NESHAPs for industrial boilers. The first challenge raised by environmental groups concerned regulations that indirectly control a group of organic pollutants by limiting carbon monoxide emissions as a proxy for the targe...

The D.C. Circuit clarified an earlier ruling vacating portions of a 2015 rule that defined when certain hazardous materials were deemed discarded—as opposed to legitimately recycled—and therefore subject to EPA's oversight under RCRA. In 2017, the court upheld some aspects of the rule and vacate...