The First Circuit granted New Hampshire's motion to stay a preliminary injunction issued in a lawsuit concerning the state's repeal of its motor vehicle emissions inspection and maintenance…
The D.C. Circuit granted small refineries' petition to review EPA's denials of their applications for exemptions from Renewable Fuel Standards obligations for the 2024 compliance year. EPA denied…
A district court denied environmental groups' motion for summary judgment in a challenge to the Bureau of Ocean Energy Management's (BOEM's) 2020 rule that walked back a proposed rule that would…
The Fifth Circuit, on panel rehearing, vacated EPA's disapproval of Texas' SIP submission to comply with the 2015 revision of ozone NAAQS. Texas petitioned for rehearing, arguing EPA …
In an unpublished opinion, the Ninth Circuit, 2-1, granted environmental groups' challenge to EPA's final rule granting California a one-year extension for the San Joaquin Valley's "five percent…
The Sixth Circuit affirmed in part and vacated in part two EPA decisions regarding the Detroit area’s attainment of NAAQS under the CAA. An environmental group challenged EPA approval of…
A district court granted in part and denied in part heavy-duty vehicle manufacturers' motion to preliminarily enjoin enforcement of California regulations requiring companies to meet state motor…
The Fifth Circuit, 2-1, denied a challenge to EPA's disapproval of a good neighbor SIP submitted by Texas in 2012 asserting that the state's contributions to ozone pollution in other states…
The D.C. Circuit granted a coalition of trade groups' petition to review EPA's 2023 rescission of the Title V affirmative defense to liability for excess emissions caused by emergency events. EPA…
The Second Circuit vacated a district court's dismissal of a lawsuit concerning a product that disables motor vehicle emissions controls. The federal government sued the company that manufactured…