Michigan v. Environmental Protection Agency

Decided June 29, 2015. Antonin Scalia delivered the opinion of the Court.

Docket 14-46 · 576 U.S. 743 (2015) · Cited 200 times

Holding

EPA interpreted § 7412(n)(1)(A) unreasonably when it deemed cost irrelevant to the decision to regulate power plants.

The Court’s statement of the holding, from the opinion’s syllabus. The syllabus is prepared by the Reporter of Decisions and is not part of the opinion of the Court — read the official opinion for authority.

How the Justices voted

Decided 5–4.

“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.

• Chevron U. S. A. Inc. v. Natural Resources Defense Council, Inc. · 467 U.S. 837 (1984)
• Securities & Exchange Commission v. Chenery Corp. · 318 U.S. 80 (1943)
• United States v. Mead Corp. · 533 U.S. 218 (2001)
• National Cable & Telecommunications Assn. v. Brand X Internet Services · 545 U.S. 967 (2005)
• Entergy Corp. v. Riverkeeper, Inc. · 556 U.S. 208 (2009)
• Perez v. Mortgage Bankers Assn. · 575 U.S. 92 (2015)
• Motor Vehicle Mfrs. Assn. of United States, Inc. v. State Farm Mut. Automobile Ins. Co. · 463 U.S. 29 (1983)
• Whitman v. American Trucking Assns., Inc. · 531 U.S. 457 (2001)
• Allentown MacK Sales & Service, Inc. v. National Labor Relations Board · 522 U.S. 359 (1998)
• Armour & Co. v. Wantock · 323 U.S. 126 (1944)
• Sossamon v. Texas · 563 U.S. 277 (2011)
• Smiley v. Citibank (South Dakota), N. A. · 517 U.S. 735 (1996)
• Industrial Union Dept., AFL-CIO v. American Petroleum Institute · 448 U.S. 607 (1980)
• Department of Transportation v. Association of American Railroads · 575 U.S. 43 (2015)
• B&B Hardware, Inc. v. Hargis Industries, Inc. · 575 U.S. 138 (2015)
• United States v. Detroit Timber & Lumber Co. · 200 U.S. 321 (1906)

Cited by

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

• Kisor v. Wilkie · 588 U.S. 558 (2019)
• Cuozzo Speed Technologies, LLC v. Lee · 579 U.S. 261 (2016)
• County of Maui v. Hawaii Wildlife Fund · 590 U.S. 165 (2020)

Official text

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

Explore from here

Antonin Scalia’s profile · All Supreme Court opinions · The Supreme Court

Source: Supreme Court of the United States, slip opinions (2015). 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).