New Source Performance Standards; Delegation of Authority to Oklahoma

The Environmental Protection Agency (EPA) is proposing to update federal regulations to reflect Oklahoma's current New Source Performance Standards (NSPS) delegation status and the mailing address for the Oklahoma Department of Environmental Quality (ODEQ). The ODEQ has submitted updated regulations for the delegation of EPA authority for implementation and enforcement of certain NSPS. The updated State regulations incorporate by reference certain NSPS promulgated by EPA, as they existed through June 30, 2023. The delegation of authority for implementation and enforcement applies to sources subject to the delegated NSPS, including those located in certain areas of Indian country as discussed herein.