Wyoming Air Rules Up for EPA's Proposed Thumbs-Up
Published Date: 9/11/2025
Proposed Rule
Summary
The EPA is giving a thumbs-up to Wyoming’s updated air quality rules that clean up language and fix references without changing the actual rules. This affects Wyoming residents and businesses by keeping air standards clear and consistent, with no new costs or deadlines. If no one objects, these updates will become official soon, making Wyoming’s air rules easier to understand and follow.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
EPA Approves Wyoming's Non‑Substantive Rule Edits
The EPA is proposing to approve Wyoming Department of Environmental Quality revisions submitted December 16, 2024 to Chapters 2, 3, 4, 8, and 14 of the Wyoming Air Quality Standards and Regulations. The changes are non‑substantive edits for grammar, formatting, clarity, and updated references to the Code of Federal Regulations and do not change the intent or scope of any rule. The EPA says these revisions meet Clean Air Act requirements, and if it receives no adverse comment the agency will finalize the approval without further action.
2024 Revision Supersedes Unacted 2014 Submission
The proposed approval specifically states that the December 16, 2024 submittal of WAQSR Chapter 2, section 4 supersedes the revisions to that section contained in Wyoming’s February 10, 2014 SIP submittal that the EPA had not previously acted on. This establishes the December 16, 2024 text as replacing the earlier unacted 2014 version for that section.
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