The D.C. Circuit vacated in part EPA's 2019 rule lifting seasonal restrictions on the sale of higher-ethanol fuel. Petroleum industry groups challenged a specific section of the rule, in which EPA announced a new interpretation of when limits on fuel volatility under §7545(h)(4) of the CAA could be...

The Ohio Supreme Court affirmed an appellate court ruling in a lawsuit concerning Volkswagen’s efforts to cheat U.S. diesel emissions tests. Ohio sued the company, arguing its post-sale tampering with emissions control systems violated the state’s Air Pollution Control Act (APCA). The company mo...

The Tenth Circuit reversed dismissal of a lawsuit concerning a New Mexico city's imposition of fees on residents who generate their own electricity via solar panels. The residents and an advocacy group argued the city's fees amounted to price discrimination in violation of FERC rules. The district c...

The Third Circuit affirmed dismissal of a lawsuit concerning reporting requirements for emissions following fires at a steel facility near Pittsburgh. An environmental group argued the facility operator should have reported the emissions to the federal government pursuant to CERCLA in addition to re...

The U.S. Supreme Court held, 6-3, that a small refinery that previously received a hardship exemption from renewable fuel requirements may obtain an "extension" even if it saw a lapse in exemption coverage in a previous year. A group of renewable fuel producers had petitioned for review of EPA's gra...

The Eighth Circuit affirmed, 2-1, summary judgment for a mining company in a lawsuit concerning the company's operation of a coal mine in North Dakota. Owners of an adjacent ranch argued the company violated the CAA by failing to obtain the proper construction permit for the mine and failing to impl...

The D.C. Circuit dismissed a nonprofit group's petition to review DOE's rule concerning the designation of critical electric infrastructure information. The group argued the rule exceeded DOE's authority under §215A of the Federal Power Act, was arbitrary and capricious, and was promulgated in viol...

A district court adopted a magistrate judge's recommendation and granted an environmental group's motion for partial summary judgment in a lawsuit concerning particulate matter emissions violations at an oil refinery in Indiana. The group brought a citizen suit under the CAA, arguing that the refine...

The D.C. Circuit denied, 2-1, New Jersey's challenge to a rule promulgated by EPA on remand concerning the CAA's new source review (NSR) program. The state argued that EPA inadequately considered concerns stemming from the predictive and subjective nature of projected emissions calculations and adop...

The D.C. Circuit denied petitions to review three FERC orders concerning cost sharing for certain upgrades to the Mid-Atlantic electricity transmission grid. Petitioners argued the Commission departed from precedent without adequate explanation, made findings that were not supported by substantial e...