A district court denied the San Joaquin Valley Unified Air Pollution Control District's motion to dismiss a CAA citizen suit brought against it for allegedly violating California's SIP.…
A district court granted in part and denied in part summary judgment for environmental advocates, states, and municipalities in a lawsuit concerning implementation of EPA's 2024 revised NAAQS for…
The D.C. Circuit denied environmental groups' petition to review an EPA rule that extended deadlines for steel mills to comply with certain hazardous emission standards. The groups argued the…
The D.C. Circuit denied petitions to review a 2024 EPA rule that revised the NAAQS for fine particulate matter from 12 µg/m³ to 9 µg/m³. Industry groups argued the EPA Administrator lacked…
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…
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In an unpublished opinion, the Ninth Circuit, 2-1, granted environmental groups' challenge to EPA's final rule granting California a one-year extension for the San Joaquin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…