Data / Federal rules / 2025-11266
Air Plan Approval; Colorado; Interim Final Determination to Stay and Defer Sanctions in the Denver Metro/North Front Range 2008 Ozone Nonattainment Area
The Environmental Protection Agency published this final rule in the Federal Register on June 18, 2025. It took effect on June 18, 2025. Comments closed on July 18, 2025.
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What the agency says
In the Proposed Rules section of this Federal Register, EPA is proposing approval of portions of State Implementation Plan (SIP) submissions from the State of Colorado dated June 26, 2023, May 23, 2024, May 30, 2024, and April 2, 2025. The submissions relate to Colorado Air Quality Control Commission Regulation Number 7 (Reg. 7) and Regulation Number 26 (Reg. 26), and address Colorado's SIP obligations for the Reasonably Available Control Technology (RACT) Serious ozone nonattainment area requirement for the 2008 ozone National Ambient Air Quality Standard (NAAQS). In this action, the EPA is making an interim final determination based on that proposed approval. The effect of this interim final determination is that the imposition of sanctions that were triggered by the EPA's December 8, 2023 disapproval are now deferred. Although this action is effective on publication, the EPA will take comment on this interim final determination.
Key facts
- Document number
- 2025-11266
- Type
- Final rule
- Action
- Interim final determination
- Agency
- Environmental Protection Agency
- Published
- June 18, 2025
- Takes effect
- June 18, 2025
- Comments due
- July 18, 2025
- Dates
- This interim final determination is effective June 18, 2025. However, comments will be accepted until July 18, 2025.
- Docket
- EPA-R08-OAR-2025-0233; FRL-12746-04-R8
- Code of Federal Regulations
- 40 CFR 52
- Topics
- Air pollution control; Carbon monoxide; Environmental protection; Greenhouse gases; Incorporation by reference; Intergovernmental relations; Lead; Nitrogen dioxide; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
- Pages
- 3
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