Train, Administrator, Environmental Protection Agency, et al. v. Colorado Public Interest Research Group, Inc., et al.

Decided June 1, 1976. Thurgood Marshall delivered the opinion of the Court.

Docket 74-1270 · 426 U.S. 1 (1976) · Cited 376 times

We don’t yet publish a summary of this opinion — read the official text below for the Court’s holding and reasoning.

How the Justices voted

Decided 8–0.

“Concurring” means agreeing with the outcome; any split shown is the Court’s judgment, not each Justice’s reasoning. Source: the Supreme Court Database (Spaeth et al.), Washington University.

Precedents cited

Supreme Court decisions this opinion relies on, ordered by how often it cites each. Cases in our collection link through; others are named.

• Udall v. Tallman · 380 U.S. 1 (1965)
• United States v. American Trucking Associations · 310 U.S. 534 (1940)
• Train v. Natural Resources Defense Council, Inc. · 421 U.S. 60 (1975)
• United States v. United Continental Tuna Corp. · 425 U.S. 164 (1976)

Cited by

Later Supreme Court opinions in our collection that cite this case.

• Stafford v. Briggs · 444 U.S. 527 (1980)
• Regents of the University of California v. Bakke · 438 U.S. 265 (1978)
• County of Washington v. Gunther · 452 U.S. 161 (1981)
• Sedima, S. P. R. L. v. Imrex Co. · 473 U.S. 479 (1985)
• Weinberger v. Romero-Barcelo · 456 U.S. 305 (1982)
• Crawford Fitting Co. v. J. T. Gibbons, Inc. · 482 U.S. 437 (1987)
• Watt v. Alaska · 451 U.S. 259 (1981)
• United Steelworkers of America v. Weber · 443 U.S. 193 (1979)
• Lindahl v. Office of Personnel Management · 470 U.S. 768 (1985)
• California Federal Savings & Loan Ass'n v. Guerra · 479 U.S. 272 (1987)
• United Air Lines, Inc. v. McMann · 434 U.S. 192 (1977)
• United States v. Culbert · 435 U.S. 371 (1978)
• Marquette National Bank of Minneapolis v. First of Omaha Service Corp. · 439 U.S. 299 (1978)

Official text

Read the official opinion (U.S. Reports, govinfo.gov)

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Source: the U.S. Reports via govinfo.gov; authoring Justice and vote lineup from the Supreme Court Database (Washington University). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-03. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).