The Environmental Protection Agency (EPA) proposes to approve into the Washington State Implementation Plan (SIP) the Yakima Regional Clean Air Agency's (YRCAA) revised outdoor and agricultural burning rule submitted by the State of Washington (Washington or the State) on October 14, 2021. The submitted revisions improve stringency, clarity and enforceability of the rule. The EPA is proposing to approve the SIP submission as consistent with Clean Air Act (Act or CAA) requirements.