The D.C. Circuit held that EPA did not violate the CAA by modifying, without notice and comment, its prior understandings of how to measure a proposed transportation project’s impact on ambient levels of particulate matter. In 2006, EPA revised “hot spot" regulations for fine particulate matter....

A district court held that a township's Home Rule Charter prohibiting deposition of any waste from oil and gas extraction within the township and invalidating any state permit to the contrary was preempted by the SDWA. In 2014, EPA granted an oil company a permit for an underground injection control...

A district court held that BLM violated the APA when it postponed compliance with Obama-era greenhouse gas emission rules. Several states and tribal citizen groups brought suit against BLM when it published a notice in the Federal Register postponing compliance dates for certain sections of the Wast...