Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Washington; Southwest Clean Air Agency

Document 2026-05712 is a Final Rule published by the Environmental Protection Agency in the Federal Register on March 24, 2026, with an effective date of March 24, 2026. The Environmental Protection Agency (EPA) is approving delegation of authority to the Southwest Clean Air Agency (SWCAA) for implementing and enforcing the Federal plan requirements for several categories of incineration units, specifically hospital/medical/ infectious waste incineration units, commercial and industrial solid waste incineration units, small municipal solid waste combustion units, and sewage sludge incineration units. The Federal plan addresses the implementation and enforcement of emission limits and other control requirements for designated air pollutants. On March 27, 2023, and March 28, 2023, respectively, the EPA Region 10 Regional Administrator and the Executive Director of SWCAA signed a Memorandum of Agreement (MOA) concerning delegation of authority of the Federal plan to SWCAA, which became effective upon signature. The geographic area covered by this MOA comprises the counties of Clark, Cowlitz, Lewis, Skamania, and Wahkiakum in the State of Washington, except in Indian country. This document informs the public of the MOA, provides a copy of the signed document, and amends regulatory text in accordance with the Clean Air Act (CAA). View the original at https://www.federalregister.gov/documents/2026/03/24/2026-05712/approval-and-promulgation-of-delegation-of-authority-for-designated-facilities-and-pollutants.

No. Document 2026-05712 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.