Air Plan Approval; Missouri; Construction Permit Exemptions

Official abstract: The Environmental Protection Agency (EPA) is proposing to approve revisions to the Missouri State Implementation Plan (SIP) received on February 10, 2026. The submission revises Missouri's regulation on construction permit exemptions in their Minor New Source Review (NSR) program. These revisions refine exemptions for emergency generators, update references to other rules, and update recordkeeping requirements. The EPA is proposing to approve this rule revision pursuant to the Clean Air Act (CAA).