October Term 2021 · Docket 20-1530

Can EPA force power plants to shift generation to other sources?

States and utilities dispute whether the agency can mandate generation shifting to cut emissions.

Official caption
West Virginia v. EPA
Latest argument session
Latest official Court activity
Latest verified event
Decided
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Post Opinion

Verified source milestones

  1. — An official oral-argument transcript was verified.
  2. — An official oral-argument transcript was verified.
  3. — An official oral-argument transcript was verified.
  4. — An official Court opinion was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Ms. See argued Congress directed EPA to regulate source-specific measures.

    Mr. Roth stated EPA's power is bounded to existing pollution sources.

    General Prelogar claimed the case is not justiciable because no rule is in effect.

    Ms. Brinkmann noted power companies use emissions trading to reduce costs.

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

The Clean Air Act lets EPA set emission limits. The agency claims this includes shifting power to other plants. Opponents say the law only covers changes to a single source.

Official sources for this section

How the case got here

The Supreme Court heard oral argument in this case on February 28, 2022.

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What each side wants

States and utilities want the Court to limit EPA to source-specific controls.

EPA wants the Court to allow generation shifting as a compliance method.

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What each side says

the sides that brought the case argue Section 111(d) requires regulating each source individually.

the opposing sides argue the statute permits a system-wide approach to emissions.

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What the justices asked

Justice Breyer asked what specific system EPA uses for existing plants.

Justice Kagan asked if inside-the-fence reforms could eliminate coal industry jobs.

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Why it matters

This case defines the scope of federal environmental regulation. It determines whether agencies can mandate market-wide changes. The outcome shapes how power plants manage emissions and costs.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

Verified official opinions and orders

Title and summary sources

Revision history

  1. Revision 1 · Post Opinion ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Post Opinion ·

    Correction: Migrated to the dated official Court activity contract without model use.

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