Data / Federal rules / 2025-14982

Air Plan Approval; Colorado; Inspection and Maintenance Program Revision

The Environmental Protection Agency published this proposed rule in the Federal Register on August 7, 2025. Comments closed on September 8, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Colorado through the Colorado Department of Public Health and Environment (CDPHE) on May 16, 2022. The revision includes changes to the Colorado Air Quality Control Commission's Regulation Number 11, "Motor Vehicle Emissions Inspection Program." The submitted changes constitute a revision to Colorado's vehicle inspection and maintenance (I/M) SIP. Colorado's I/M SIP revision includes several minor clerical and typographical revisions. The I/M SIP revision also streamlines the visual inspection procedures used on subject vehicles in obtaining I/M program emissions certification compliance and vehicle registration renewal. CDPHE also submitted revisions to its I/M program regulations which were marked as "state only" revisions and not meant for EPA consideration. The EPA is not acting upon these state-only changes in this action.

Key facts

Document number: 2025-14982
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: August 7, 2025
Comments due: September 8, 2025
Dates: Written comments must be received on or before September 8, 2025.
Docket: EPA-R08-OAR-2024-0468; FRL-12884-01-R8
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Carbon monoxide; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen oxides; Ozone; Reporting and recordkeeping requirements; Volatile organic compounds
Pages: 5

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on carbon monoxide · Rules on environmental protection · Published in August 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.