Data / Federal rules / 2025-07938
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 May 8, 2025. It took effect on May 8, 2025. Comments closed on June 9, 2025.
SpecStream is the live web data engine for teams and agents. It reads every rule and proposed rule in the Federal Register each morning, and this page is that reading. Name your industry once and new rules, comment deadlines and effective dates arrive in your sheet, CRM, Slack or agent as they are published.
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, and April 2, 2025. The submissions relate to Colorado Air Quality Control Commission Regulation Number 7 (Reg. 7) and Regulation Number 25 (Reg. 25) and address Colorado's SIP obligations for the contingency measures 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 November 7, 2023 disapproval are now deferred. Although this action is effective upon publication, the EPA will take comment on this interim final determination.
Key facts
- Document number
- 2025-07938
- Type
- Final rule
- Action
- Interim final determination
- Agency
- Environmental Protection Agency
- Published
- May 8, 2025
- Takes effect
- May 8, 2025
- Comments due
- June 9, 2025
- Dates
- This interim final determination is effective May 8, 2025. However, comments will be accepted until June 9, 2025.
- Docket
- EPA-R08-OAR-2024-0622; FRL-12746-02-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
Other documents from the Environmental Protection Agency
Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on carbon monoxide · Rules on environmental protection · Published in May 2025
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.