The U.S. Supreme Court, 7-2, held that EPA's 2022 denials of six small refinery exemption petitions were locally or regionally applicable actions that fell within the "nationwide scope or effect" exception under the CAA, requiring venue in the D.C. Circuit. The small refineries challenged the denial...

he U.S. Supreme Court, 8-0, held that EPA's disapprovals of Oklahoma's and Utah's SIPs were locally or regionally applicable actions reviewable in a regional circuit court. The two states petitioned the Tenth Circuit to review the disapprovals, which were two of 21 SIPs EPA disapproved in 2023 for f...