July 9, 2020

09 July 2020

Tenth Circuit Rejects EPA’s Position on Renewal of Clean Air Act Permits

On July 2, 2020, in Sierra Club v. United States Environmental Protection Agency, the U.S. Court of Appeals for the Tenth Circuit rejected the Environmental Protection Agency’s (EPA) interpretation of the scope of its obligations to review permits under Title V of the Clean Air Act (CAA). The court found that the plain language of EPA’s regulations requires EPA to review whether a state-issued Title V permit complies with all applicable CAA requirements, not only the requirements the state included in the permit. The issue may end up in the U.S. Supreme Court, as it diverges from a recent ruling by the Fifth Circuit.