Air Plan Approval; Missouri; Construction Permit Exemptions
Published Date: 7/30/2026
Proposed Rule
Summary
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).
Analyzed Economic Effects
2 provisions identified: 0 benefits, 0 costs, 2 mixed.
Emergency generator exemption changes
If you operate emergency generators in Missouri, the State submitted a revision on February 10, 2026 that refines which emergency generators are exempt from construction permits under Missouri's Minor New Source Review (NSR) program. The Environmental Protection Agency is proposing to approve that revision, which would change how the exemption rules apply to emergency generators in Missouri.
Recordkeeping requirement updates
Missouri's February 10, 2026 SIP revision updates recordkeeping requirements tied to construction permit exemptions in the Minor NSR program. If the EPA approves the revision, owners or operators in Missouri who claim these exemptions will need to follow the updated recordkeeping rules when demonstrating eligibility for exemptions.
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