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Oklahoma, et al. v. Environmental Protection Agency
The Supreme Court ruled that EPA's disapprovals of Oklahoma and Utah state implementation plans (SIPs) under the Clean Air Act are locally or regionally applicable actions reviewable in a regional Circuit, not the D.C. Circuit. The Court emphasized that SIP disapprovals are state-specific and based on fact-intensive analysis.
Supreme Court of the United States
Date Added
20 April 2026 at 19:16:28
Why it matters
Clarifies venue for judicial review of EPA actions under the Clean Air Act, affecting how and where states and regulated entities can challenge EPA disapprovals of environmental compliance plans.
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