This educational guide is based on the linked primary sources. It is not a Court publication, is not affiliated with the Court, and is not legal advice.
In brief
Overview
The Supreme Court held that EPA's disapprovals that are locally or regionally applicable are reviewable in a regional circuit.
The Court reversed the Tenth Circuit's judgment and remanded the cases for further proceedings consistent with this opinion.
The Court granted certiorari to review the transfer decision.
Background and question before the Court
EPA issued disapprovals of the Oklahoma and Utah State Implementation Plans (SIPs).
The Tenth Circuit held that the challenges to those disapprovals should be reviewed in the D.C. Circuit.
The Court granted certiorari to review the transfer decision.
What each side argues
EPA
EPA argued that its arguments, as well as those of the Tenth Circuit, do not survive scrutiny and should be rejected.
What happened at oral argument
What the Court decided
The Court held that EPA's disapprovals that are locally or regionally applicable are reviewable in a regional circuit.
The Tenth Circuit erred in holding that the challenges should be reviewed in the D.C. Circuit; the Court reversed that judgment and remanded for further proceedings consistent with this opinion.
Justice Gorsuch filed a concurrence agreeing that the proper venue is a regional circuit, though he reached that conclusion by a different reasoning.
Why it matters
Terms to know
No glossary terms are available for this guide.
Primary sources
Read the source materials on the official site or open the immutable repository copy used for this guide.
- e0dd81dc562be0cee319-r1-561bd2f5f8a31c4b.pdforal argument transcript
- e43d7cde9fbb330cd263-r1-6e1293decc758c7c.pdfopinion
Guide generated September 27, 2026. Automated validation accepted this version.