EPA v. Calumet Shreveport Refining, L.L.C.
The Supreme Court ruled that small oil refineries challenging EPA's rejection of their hardship exemptions from renewable fuel mandates must take their case to the D.C. Circuit, not their local regional appeals court, because EPA's denials rested primarily on legal interpretations and economic theories that applied to all refineries nationwide.
The decision establishes a new framework for deciding which federal appeals court must hear challenges to EPA actions — a question with practical consequences for companies, states, and advocacy groups that litigate under the Clean Air Act.
How it got here: The Fifth Circuit kept the case rather than transferring it to the D.C. Circuit, ruled for the refineries on the merits, and EPA asked the Supreme Court to step in; the Court agreed to hear the venue question.
The Case in Depth
What happened
Six small oil refineries — each processing no more than 75,000 barrels of crude oil daily — asked the EPA to exempt them from federal requirements to blend ethanol and other renewable fuels into their products, claiming compliance caused them "disproportionate economic hardship." EPA denied all six petitions, along with roughly 99 others, in two large omnibus notices. The denials rested primarily on EPA's interpretation of "disproportionate economic hardship" and its economic conclusion that fuel-blending costs are passed along to consumers rather than absorbed by refineries.
The question before the Court
When the EPA denies small oil refineries' requests to be excused from federal renewable-fuel blending rules, must the refineries challenge those denials in a regional appeals court or only in the D.C. Circuit?
The Court's answer
The D.C. Circuit. The Court ruled that while each EPA denial of an individual refinery's exemption petition is technically a local or regional action — applying only to one refinery in one location — a special exception in the Clean Air Act still routes those challenges to the D.C. Circuit. That exception applies when EPA's action rests primarily on a legal interpretation or factual finding that applies nationwide, not merely on refinery-specific circumstances.
Here, EPA's denials were driven primarily by two conclusions that applied to all refineries everywhere: its reading of what "disproportionate economic hardship" means under federal law, and its economic theory that the cost of buying renewable-fuel compliance credits gets passed through to consumers rather than hurting the refinery. EPA used those nationwide principles to presumptively deny all petitions before ever looking at any individual refinery's circumstances — and examined each refinery's specific facts only to confirm no reason existed to depart from that preset conclusion. Because the nationwide reasoning was the core driver of every denial, the exception applies and the D.C. Circuit is the right court.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Small refineries that want to fight EPA's refusal to grant them fuel-blending exemptions must now pursue those challenges in the D.C. Circuit, likely making litigation more expensive and logistically difficult for companies based far from Washington. More broadly, the ruling's new framework will determine which court hears a wide range of future Clean Air Act disputes, shaping how companies and states push back against EPA decisions.
What changes now
The Fifth Circuit's judgment is vacated and the case is sent back. The small refineries' challenges must be transferred to the D.C. Circuit, where they will be heard on the merits under the framework the Supreme Court established. Other refinery challenges that were already transferred to or pending in the D.C. Circuit will proceed there as well. The Court's new two-step venue framework will govern future Clean Air Act venue disputes across the country.
What this does not decide
The Court decides only where the lawsuits must be filed — not whether EPA was right to deny the exemptions. The decision does not address the merits of the refineries' hardship claims or EPA's economic theories. It also explicitly leaves open edge cases about when an action affecting more than one circuit, or nearly the entire country, crosses the line into "nationally applicable."
Concurrences and dissents
Dissent — Justice Gorsuch
“At the end of the day, venue rules are like traffic laws. They simply tell litigants where to go, and they should be easy to follow.”Justice Gorsuch's closing critique of the majority's new multi-factor venue test as too complicated for a simple procedural question.
Justice Gorsuch agreed with the majority that EPA's individual refinery denials are locally or regionally applicable actions, but disagreed that the 'nationwide scope or effect' exception applies here. In his view, the Clean Air Act itself answers where cases belong: courts should look at what determinations the CAA's substantive provisions actually require EPA to make. The small-refinery provisions call for refinery-specific determinations only — never a nationwide one — so the case belongs in a regional circuit. He argued the majority's new multi-factor 'core driver' test conflates EPA's determinations with the broader reasoning supporting them, and will generate expensive, unpredictable venue disputes because there is no objective standard for weighing which considerations 'predominated' in any given EPA decision.
How the Court got there
The legal reasoning, step by step
- The Clean Air Act's venue provision creates a two-step inquiry. First, is the EPA action 'nationally applicable' or only 'locally or regionally applicable'? If nationally applicable, the case goes to the D.C. Circuit. If locally or regionally applicable, a second question arises: does the 'nationwide scope or effect' exception still redirect the case to the D.C. Circuit?
- The relevant 'action' for venue purposes is defined by the CAA's substantive provisions, not by how EPA packages its decisions in the Federal Register. Because the CAA's small-refinery provision authorizes EPA to act on each individual petition, every single denial is its own distinct action for venue purposes — not a collective group action just because EPA issued them in omnibus notices.
- Each EPA denial of a single refinery's petition is 'locally or regionally applicable' because it applies only to that particular refinery in a particular place. The Court rejected EPA's argument that bundling petitions together could render the action nationally applicable, warning that such a rule would let EPA manipulate venue by grouping unrelated decisions into a single Federal Register entry.
- The 'nationwide scope or effect' exception applies when a determination of nationwide breadth is the true 'core' or primary driver of EPA's action — not merely a but-for cause. Simple but-for causation is too low a bar because almost any EPA action rests partly on its reading of federal statutes; under that standard, the exception would swallow the default rule favoring regional court review.
- Courts assess whether the 'core' standard is met de novo — independently, without deferring to EPA. The CAA requires both that EPA certify the exception applies and that it actually does apply, meaning Congress built in an independent judicial check rather than leaving the determination entirely to the agency.
- EPA's two nationwide determinations — its interpretation of 'disproportionate economic hardship' and its RIN cost-passthrough economic theory — were the core basis for the denials. EPA used them to reach a presumptive denial of every petition before examining any individual refinery's facts. The refinery-specific review that followed was merely confirmatory, making the nationwide determinations the primary driver of each decision and triggering the D.C. Circuit exception.