# 2025-24140: EPA Backs Colorado's Air Rule Tweaks for Better Readability

2025-24140, Air Plan Approval; CO; Revisions to Colorado Procedural Rules and Common Provisions Regulation, is a Federal Register proposed rule from Environmental Protection Agency published 2026-01-02, effective 2026-02-02 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2025-24140
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-24140
- Title: Air Plan Approval; CO; Revisions to Colorado Procedural Rules and Common Provisions Regulation
- Type: Proposed Rule
- Agencies: Environmental Protection Agency
- Citation: 91 FR 97
- Published: 2026-01-02
- Effective: 2026-02-02
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-11

## In one line

EPA Backs Colorado's Air Rule Tweaks for Better Readability

## Summary

The EPA is proposing to approve some cleanup changes to Colorado’s air quality rules that make them easier to read and follow. These updates don’t change any big rules but help keep things clear and organized for the Colorado Department of Public Health and Environment. If no one objects by February 2, 2026, these improvements will go into effect without delay, with no extra costs involved.

## Abstract

The Environmental Protection Agency (EPA) is proposing to approve revisions to the Colorado State Implementation Plan (SIP) that were submitted by the Colorado Department of Public Health and Environment (CDPHE) on May 20, 2022. CDPHE requested EPA approval of revisions to the Colorado's Procedural Rules and Common Provisions Regulation. The revised rules include non-substantive updates to rule language that are administrative in nature and were intended to provide for general cleanup and improved readability. The EPA is proposing approval of these SIP revisions because we have determined that they are in accordance with the requirements for SIP provisions under the Clean Air Act (CAA). In the "Rules and Regulations" section of this Federal Register, we are approving these SIP revisions as a direct final rule without a prior proposed rule. If we receive no adverse comment, we will not take further action on this proposed rule.

## Effects PRIA read

No economic effects identified for this document.

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## Sources
- [2025-24140 on federalregister.gov](https://www.federalregister.gov/documents/2026/01/02/2025-24140/air-plan-approval-co-revisions-to-colorado-procedural-rules-and-common-provisions-regulation)
- [2025-24140 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-01-02/pdf/2025-24140.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2025-24140 (as of 2026-06-11).