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.
Your PRIA Score
Personalized for You
How does this regulation affect your finances?
Sign up for a PRIA Policy Scan to see your personalized alignment score for this federal register document and every other regulation we track. We analyze your financial profile against policy provisions to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-11047 — National Emission Standards for Hazardous Air Pollutants From Hazardous Waste Combustors: Residual Risk and Technology Review
The EPA just updated rules for places that burn hazardous waste, like incinerators and boilers, to keep the air safe and clean. They confirmed current standards work well but added new limits on harmful gases like hydrogen fluoride and hydrogen cyanide. These changes start June 3, 2026, and include easier electronic reporting and some new rules for startup and shutdown times—helping protect health without big costs.
2026-10641 — Hazardous and Solid Waste Management System: Disposal of Coal Combustion Residuals From Electric Utilities; Federal CCR Permit Program; Reopening of Comment Period
The EPA is reopening the comment period until June 29, 2026, for its proposed rule to create a federal permit program for safely disposing of coal ash from power plants. This affects electric utilities that handle coal waste and aims to improve environmental safety while possibly impacting their costs. Now’s the time for everyone to share their thoughts and help shape the rules!
2026-10387 — Phasedown of Hydrofluorocarbons: Reconsideration of Certain Regulatory Requirements Promulgated Under the Technology Transitions Provisions of the American Innovation and Manufacturing Act of 2020
The EPA is updating rules to phase down hydrofluorocarbons (HFCs), chemicals used in cooling systems like refrigerators and air conditioners. These changes affect businesses in refrigeration, supermarkets, semiconductor manufacturing, and more, allowing some older equipment made before 2025 to keep running. The new rules kick in on July 27, 2026, helping industries transition smoothly while cutting harmful emissions.
2026-10086 — Extending the Compliance Deadline for the PFOA and PFOS Maximum Contaminant Levels
The EPA is giving water systems more time to meet safety rules for two harmful chemicals, PFOA and PFOS, by extending the deadline from April 2029 to April 2031 if they ask for it. This helps water providers get ready without rushing, keeping our drinking water safe. The EPA wants your thoughts and will hold a public hearing in July 2026 to hear from everyone.
2026-10085 — Rescission of Regulatory Determinations and Removal of Related Provisions for Four PFAS Substances (PFHxS, PFNA, HFPO-DA (GenX), and the Mixture of These Three PFAS Plus PFBS)
The EPA is proposing to undo its rules for four PFAS chemicals (PFHxS, PFNA, GenX, and a mix including PFBS) in drinking water because the original process wasn’t done right. This means public water systems won’t have to monitor or treat these chemicals for now. People and water providers should weigh in by July 20, 2026, and a virtual hearing happens July 7.
2026-09895 — Effluent Limitations Guidelines and Standards for the Steam Electric Power Generating Point Source Category-Unmanaged Combustion Residual Leachate
The EPA is updating rules for steam electric power plants to better control dirty water leaking from leftover coal waste. This change affects existing power plants and is expected to save up to $1 billion a year while protecting water quality. Comments on the proposal are open until June 17, 2026, so now’s the time to speak up!
Previous / Next Documents
Previous: 2025-17481 — Revising U.S. Standards for Grades of Lemons
The USDA is updating lemon grading rules to include a new category called "seedless lemons." This change affects lemon growers, sellers, and buyers by setting clear standards and labeling rules for seedless lemons. The update helps everyone know exactly what they’re getting, with no extra costs or delays expected.
Next: 2025-17498 — Air Plan Revisions; Arizona; Maricopa County Air Quality Department; Volatile Organic Compounds; Solvent Cleaning
The EPA wants to approve new rules from Maricopa County that cut down smelly, harmful chemicals released during solvent cleaning. This change helps keep Arizona’s air cleaner and affects businesses using these cleaning methods. The EPA is asking for feedback now before making it official, so changes could happen soon without big costs.