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Air Plan Approval; Wyoming; R-35 Wyoming Air Quality Standards and Regulations Rule Package | Sporos

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Air Plan Approval; Wyoming; R-35 Wyoming Air Quality Standards and Regulations Rule Package

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).

Published

Sep 11, 2025

Effective

Nov 10, 2025

Comments Close

Oct 14, 2025

Citation

90 FR 43915

Agencies

2025-17486Air Plan Approval; Wyoming; R-35 Wyoming Air Quality Standards and Regulations Rule Package

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Agencies (1)

EPA — Environmental Protection Agency

Topics

Air pollution control Carbon monoxide Environmental protection Greenhouse gases Incorporation by reference Intergovernmental relations Lead Nitrogen dioxide Ozone Particulate matter Reporting and recordkeeping requirements Sulfur oxides Volatile organic compounds

Docket IDs

EPA-R08-OAR-2025-0204

FRL-12942-02-R8

CFR References

40 CFR 52

Document Details

Type: Final Rule
Action: Direct final rule.
Document #: 2025-17486
Citation: 90 FR 43915
Publication Date: Sep 11, 2025
Effective Date: Nov 10, 2025
Dates: This direct final rule is effective on November 10, 2025, without further notice, unless the EPA receives adverse comments by October 14, 2025. If adverse comments are received, the EPA will publish a timely withdrawal of the direct final rule in the Federal Register informing the public that the rule will not take effect.
Federal Register Pages: Vol. 90, pp. 43915–43919
Page Views: 137

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