The D.C. Circuit denied a chemical manufacturer's and two trade groups' petitions to review EPA's 2020 rule regulating emissions from miscellaneous organic chemical manufacturing facilities. The petitioners challenged EPA's assessment of cancer risk from exposure to ethylene oxide emissions. The cou...
The D.C. Circuit denied a petition to review EPA's 2023 regulations that imposed new reporting requirements on biogas producers. An industry group argued, among other things, that EPA had no authority to regulate biogas producers and that three categories in the regulations—those related to biogas...
In a per curiam order, the D.C. Circuit denied states' and industry groups' motions to stay EPA's rule aimed at reducing pollution from fossil fuel power plants. Petitioners argued EPA acted arbitrarily and capriciously in determining that carbon capture and other emission control technologies were ...
The U.S. Supreme Court, 5-4, granted three states' and several industry groups' applications to stay enforcement of EPA's 2023 rule issuing a federal implementation plan (FIP) for 23 states whose SIPs the Agency determined had failed to adequately address new air quality standards for ozone levels u...
On February 7, 2024, the U.S. Environmental Protection Agency (EPA) announced a final rule imposing a stricter limit for the fine particulate matter (PM2.5) national ambient air quality standard (NAAQS). The annual exposure standard for PM2.5, currently set at 12 micrograms per cubic meter of air, will now be 9 micrograms per cubic meter, marking the first time in over eight years that EPA has strengthened any NAAQS. The rule is predicted to have many health benefits, such as preventing 4,500 premature deaths by 2032, which may particularly affect overburdened communities.