U.S. Court of Appeals for the D.C. Circuit

Center for Biological Diversity v. EPA

August 25, 2026

Summary

The court denied the petition for review, holding that EPA reasonably determined that its revised and retained secondary air-quality standards would not affect protected species or habitat and that EPA made its effects determination at a permissible time. The court also held that the organization had associational standing because its members showed concrete environmental interests, causation, and redressability under the relaxed standards applicable to procedural injuries.