Diamond Alternative Energy LLC v. Environmental Protection Agency

145 S. Ct. 2121 · Decided June 20, 2025 · Supreme Court of the United States

At a glance

Diamond Alternative Energy LLC v. Environmental Protection Agency was decided on June 20, 2025 by a vote of 7–2. The Court reversed the lower court's decision and remanded the case. Justice Brett M. Kavanaugh wrote the opinion of the Court. SCDB classifies its main issue as “Judicial review of agency actions” in the Judicial Power area.

Read the opinion

• CourtListener (Free Law Project) — opinion text
• Supreme Court of the United States — slip opinions, October Term 2024
• Supreme Court of the United States — docket 24-7

Case details

How the Justices voted

Full case caption

Diamond Alternative Energy LLC v. Environmental Protection Agency

SCDB identifiers: case 2024-059, docket 2024-059-01.

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Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error