Wyoming Air Quality Standards Formatting Updates

Summary

The Environmental Protection Agency (EPA) is taking direct final action to approve revisions to the Wyoming State Implementation Plan (SIP) submitted by the Wyoming Department of Environmental Quality (WDEQ) on December 16, 2024. WDEQ requested the EPA approve the revised rules for Chapters 2, 3, 4, 8, and 14 in the Wyoming Air Quality Standards and Regulations (WAQSR). The revised rules include non- substantive updates to rule language that ensure consistent grammar, formatting, and written clarity as well as updated references to the Code of Federal Regulations (CFR). The EPA is taking this action pursuant to the Clean Air Act (CAA).

Compliance Requirements

1. #1

   Submit comments identified by Docket ID No. EPA-R08-OAR-2025-0204 to the Federal Rulemaking Portal: https://www.regulations.gov; Do not submit electronically any information you consider to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute; Multimedia submissions (audio, video, etc.) must be accompanied by a written comment; Comply with updated Wyoming Air Quality Standards and Regulations Chapters 2, 3, 4, 8, and 14 as approved by EPA; Incorporate by reference 40 CFR parts 50, 51, 53, 60, 81, and 93 as published on July 1, 2023; File petitions for judicial review in the United States Court of Appeals for the appropriate circuit

   Deadline: 2025-10-11(30 days after date of publication in the Federal Register (09/11/2025))

Market Impacts

• Updated incorporation by reference of 40 CFR parts 50, 51, 53, 60, 81, and 93 as published on July 1, 2023, requiring businesses to comply with the most current federal air quality standards

Action Items

1. Update documentation to reflect new formatting guidelines

   Revise all relevant air quality documentation to comply with the updated state style and formatting guidelines as specified in WAQSR Chapters 2, 3, 4, 8, and 14

2. Incorporate by reference the updated CFR parts

   Adopt and reference 40 CFR parts 50, 51, 53, 60, 81, and 93 as published on July 1, 2023 in all applicable compliance materials and systems

3. Ensure grammatical and typographical accuracy in regulations

   Correct any typographical errors and ensure consistent grammar in all air quality standards and regulations as per the revised WAQSR

4. Align with updated state effective dates

   Implement all changes in accordance with the state effective date of April 30, 2024, and be prepared for EPA effective date upon publication in the Federal Register

Estimated Monetary Impact

Basis: The regulation explicitly states these are 'non-substantive formatting revisions' and 'administrative in nature' with 'no substantive changes'. The EPA states this action 'does not impose additional requirements beyond those imposed by state law' and 'does not impose an information collection burden'. No monetary amounts, penalties, or compliance costs are mentioned. The document indicates these are minor formatting and reference updates with no operational impact.Confidence: 20%

Validated Company Impacts