# Air Plan Approval; Missouri; Construction Permit Exemptions

**Action Urgency Score:** 65/100

| Field | Value |
|---|---|
| Agency | Environmental Protection Agency |
| Type | Final rule |
| Action | Final rule. |
| Published | 2026-10-08 |
| Effective | 2026-11-09 |
| Significant | No |
| CFR parts | 40 CFR 52 |
| Summary | The U.S. Environmental Protection Agency (EPA) is approving revisions to the Missouri State Implementation Plan (SIP) received on February 10, 2026. The submission revises Missouri's regulation on construction permit exemptions in its Minor New Source Review (NSR) program. These revisions refine exemptions for emergency generators, update references to other rules, and update recordkeeping requirements. The EPA's final approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA). |
| Document number | 2026-20634 |

## Why this score
- Effective date within 30 days.
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/10/08/2026-20634/air-plan-approval-missouri-construction-permit-exemptions). Last refreshed: 2026-11-03T19:10:06.902Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.