Air Plan Approval; Colorado; Serious Attainment Plan Contingency Measures and RACT Requirements for the 2008 8-Hour Ozone National Ambient Air Quality Standards for the Denver Metro/North Front Range Nonattainment Area
Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register April 9, 2026. Document 2026-06837. Updated Nov. 12, 2026.
- What it does
The Environmental Protection Agency (EPA) is approving state implementation plan (SIP) submittals from the State of Colorado under the Clean Air Act (CAA) that address contingency measures and Reasonably Available Control Technology (RACT) requirements for the 2008 ozone National Ambient Air Quality Standard (NAAQS) for the Denver Metro/North Front Range (DMNFR) Serious ozone nonattainment area. The EPA finds that the State has met the applicable CAA requirements for Serious area contingency measures as well as RACT for certain stationary sources. Accordingly, the EPA is approving the respective SIP revisions to implement the submitted motor vehicle coating contingency measure, but we are not taking action on one of the identified contingency measures included in the submittals that concerns pneumatic controllers. In addition, the EPA is approving regulatory revisions that Colorado adopted to implement RACT requirements for landfill/biogas fired engines, refinery fuel process heaters, and a cold rolling mill, except that we are not taking final action on the RACT requirement for one refinery fuel process heater that was submitted by Colorado due to an identified error. The EPA is taking this action pursuant to the CAA.
The Environmental Protection Agency's summary, as published in the Federal Register.
- What changed in the regulation
1 part of Title 40 of the Code of Federal Regulations:
Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).
- Compared with
The Environmental Protection Agency has published 245 final rules in 2026 so far, compared with 263 in all of 2025.
Counted by the Tribune from Federal Register records since Jan. 1, 2025.
- What happens next and when
This rule is effective on May 11, 2026.
The agency's dates, word for word.
The record as published
| Document number | 2026-06837 |
|---|---|
| Action | Final rule. |
| Agencies | Environmental Protection Agency |
| Published | April 9, 2026 |
| Effective date | May 11, 2026 |
| Docket | EPA-R08-OAR-2024-0622 |
Source: the Federal Register (public domain). The document in the Federal Register