October Term 2008 · Docket 07-588

Can EPA weigh costs when setting water intake limits?

Entergy argues EPA must ignore costs. Riverkeeper says EPA must balance them.

Official caption
Entergy Corp. v. Riverkeeper, Inc.
Latest argument session
Latest official Court activity
Latest verified event
Argued
Sources analyzed through
Official Transcript

Verified source milestones

  1. — An official oral-argument transcript was verified.
  2. — An official oral-argument transcript 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

    Mr. Joseffer argued EPA has construed the Act to permit cost consideration.

    Mr. Lazarus stated Congress did not authorize EPA to decide benefits did not justify costs.

    Ms. Mahoney noted executive orders require cost-benefit analysis for regulations.

    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 dispute centers on Section 316(b) of the Clean Water Act. Entergy claims this section bans cost-benefit analysis. Riverkeeper argues EPA must consider costs and benefits.

Official sources for this section

How the case got here

The Supreme Court heard oral argument in this case on December 2, 2008.

Official sources for this section

What each side wants

Entergy wants the Court to strike down EPA's cost-benefit approach.

Riverkeeper wants the Court to uphold EPA's cost-benefit approach.

Official sources for this section

What each side says

Entergy argues Congress did not authorize EPA to weigh costs against benefits.

Riverkeeper argues EPA has long considered costs and benefits in this context.

Official sources for this section

What the justices asked

Justice Souter asked if these decisions are more subtle than a cost-benefit cutoff.

Justice Kennedy assumed BTA is the most rigorous standard in the statute.

Official sources for this section

Why it matters

This case defines how regulators balance environmental protection against economic costs. It shapes future water quality standards nationwide.

Official sources for this section

What happens next

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

Official sources for this section

Official Court provenance

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

Title and summary sources

Revision history

  1. Revision 1 · Official Transcript ·

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

  2. Revision 2 · Official Transcript ·

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

Download this sanitized case as JSON