Environmental Protection Agency v. California ex Rel. State Water Resources Control Board

426 U.S. 200 · Decided June 7, 1976 · Supreme Court of the United States

At a glance

Environmental Protection Agency v. California ex Rel. State Water Resources Control Board was decided on June 7, 1976 by a vote of 7–2. The Court reversed the lower court's decision. Justice Byron R. White wrote the opinion of the Court. SCDB classifies its main issue as “National supremacy, air or water pollution” in the Federalism area.

Read the opinion

• CourtListener (Free Law Project) — opinion text
• Library of Congress — official U.S. Reports scan

Case details

How the Justices voted

Full case caption

Environmental Protection Agency et al. v. California ex Rel. State Water Resources Control Board et al.

SCDB identifiers: case 1975-112, docket 1975-112-01.

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Same Term, same area (Federalism)

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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