Oklahoma v. EPA
The Supreme Court ruled unanimously that Oklahoma and Utah can challenge the EPA's rejection of their state air-quality plans in their own regional federal appeals courts, not in the D.C. Circuit — because each state's rejected plan is its own separate, locally applicable EPA action regardless of how the agency packaged it.
The decision limits the EPA's ability to steer legal challenges into the D.C. Circuit by bundling individual state-specific decisions into one omnibus federal rule, and it reinforces that states dealing with air-quality disputes have a closer, more accessible court option.
How it got here: Oklahoma and Utah challenged EPA's plan rejections in regional circuits; the Tenth Circuit transferred the cases to the D.C. Circuit; the states and industry petitioners asked the Supreme Court to reverse that transfer.
The Case in Depth
What happened
Oklahoma and Utah each submitted state plans explaining how they would meet federal ozone air-quality standards. The EPA reviewed each plan on its own merits and rejected both — along with plans from 19 other states — for failing to adequately address how their in-state pollution drifts into neighboring states. Rather than issuing 21 separate rejections, the EPA bundled all of them into one omnibus federal rule, then argued that only the D.C. Circuit had the authority to hear challenges to that single rule.
The question before the Court
When the EPA bundles the rejection of dozens of individual state air-quality plans into a single nationwide rule, can it force states to challenge those rejections only in the Washington, D.C. federal appeals court?
The Court's answer
No — the EPA cannot force Oklahoma and Utah to challenge the rejection of their individual state air-quality plans in the D.C. Circuit simply because the EPA chose to bundle those rejections into one sweeping federal rule. Under the Clean Air Act's venue provision, what controls is not how the EPA packages its decisions but what kind of action the statute defines each decision to be. Because the Clean Air Act treats each state plan approval or rejection as its own discrete action — one that applies only to the state that submitted the plan — each rejection is a locally or regionally applicable action, reviewable in the appropriate regional circuit.
The Court also rejected the EPA's fallback argument that an exception for actions with "nationwide scope or effect" should send the cases to D.C. anyway. That exception applies only when a nationwide justification is the primary driver of the EPA's decision. Here, the EPA's disapprovals rested predominantly on state-specific, fact-intensive evaluations — each state received a unique set of reasons for rejection — so no nationwide determination was the controlling factor, and the exception did not apply.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
States and energy companies challenging EPA rejections of state air-quality plans can now sue in regional federal courts rather than being forced to litigate hundreds or thousands of miles away in Washington, D.C. This keeps the litigation in courts more familiar with local conditions and makes it harder for the EPA to pick a favorable forum simply by packaging many state-specific decisions into one sweeping federal rule.
What changes now
The Tenth Circuit must allow Oklahoma's and Utah's challenges to proceed in the appropriate regional federal appeals court rather than transferring them to the D.C. Circuit. The underlying question — whether the EPA was correct to reject those states' air-quality plans — will now be litigated on the merits. Similar challenges by other states and industry groups are already pending in other regional circuits, which had already reached the same venue conclusion the Supreme Court now confirms.
What this does not decide
The Court did not decide whether the EPA was right or wrong to reject Oklahoma's and Utah's state air-quality plans. This ruling addresses only where those challenges may be filed — not whether the states will ultimately win. The Court also left open a separate statutory question about a parenthetical in the venue provision that could affect how future disapprovals are classified.
Concurrences and dissents
Concurrence — Justice Gorsuch
Justice Gorsuch agreed that the cases belong in a regional circuit, not the D.C. Circuit, but reached that conclusion by a different path than the majority. He declined to join the majority's analytical framework — which relies on reasoning from the companion Calumet case — referring instead to his dissenting opinion in that case for his own explanation. He wrote separately to signal that while he endorses the outcome, he does not endorse the doctrinal route the majority took to get there.
How the Court got there
The legal reasoning, step by step
- The Clean Air Act's venue provision (§7607(b)(1)) channels challenges to EPA actions to the D.C. Circuit if the action is 'nationally applicable,' and to a regional circuit if it is 'locally or regionally applicable.' The Court applied a two-step framework it established the same day in a companion case (EPA v. Calumet Shreveport Refining): first identify the relevant 'action' and classify it; then, if locally applicable, ask whether a 'nationwide scope or effect' exception overrides the default of regional review.
- The first step requires identifying what the relevant EPA 'action' actually is. The Court held that 'action' is defined by the specific Clean Air Act provision under which EPA acted — not by how the EPA chose to present or package its decision in the Federal Register. Even when EPA bundles many decisions into one omnibus rule, each underlying decision remains its own separate action for venue purposes.
- The Clean Air Act's state implementation plan (SIP) process works state by state: each state submits its own plan, and the EPA approves or disapproves each one individually under §7410. The statute itself lists individual SIP approvals as examples of locally or regionally applicable actions, and the Court reasoned that SIP disapprovals are 'the opposite side of the same coin' — they arise under the same statutory authority and must be treated the same way.
- Because each SIP disapproval formally applies only to the state that submitted the plan, each is a locally or regionally applicable action. The EPA's decision to package 21 separate state disapprovals into one omnibus rule had no effect on that classification. The Court also rejected the Tenth Circuit's view that EPA's use of 'uniform statutory interpretation and common analytical methods' made its actions nationally applicable — that kind of reasoning goes to why the EPA did what it did, not to the formal geographic reach of what it did.
- At the second step, the Court examined whether the 'nationwide scope or effect' exception applied. This exception requires that a nationwide justification be the primary explanation for and driver of the EPA's action — not merely one factor among many. Here, the EPA evaluated each state's plan on its own merits, produced a unique list of reasons for each state's disapproval, and rested its conclusions on intensely factual, state-specific analysis. Any nationwide analytical tools the EPA used were screening heuristics, not the primary drivers of the rejections.
- Because no nationwide determination all but settled EPA's decisions about Oklahoma and Utah — in contrast to the companion Calumet case, where two uniform national conclusions presumptively resolved all the petitions before EPA — the 'nationwide scope or effect' exception did not apply. The cases belong in a regional circuit.
Doctrinal impact
Cases affected by this decision
Reaffirms EPA v. Calumet Shreveport Refining, L.L.C. (605 U. S. ___)
The Court applied and built upon Calumet's two-step venue framework for Clean Air Act challenges, decided the same day.