Data / Federal rules / 2025-19280

Visibility Protection: Regional Haze State Plan Requirements Rule Revision

The Environmental Protection Agency published this proposed rule in the Federal Register on October 2, 2025. Comments closed on December 1, 2025.

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What the agency says

The Environmental Protection Agency (EPA or Agency) is soliciting information and requesting comment to assist in the development of regulatory changes pertaining to the restructuring of the Regional Haze Rule (RHR). Under the current RHR, states must submit state implementation plans (SIPs) to protect visibility in mandatory Class I Federal areas (Class I areas) to demonstrate reasonable progress towards the national visibility goal. The Agency is seeking input regarding how the EPA can meaningfully revise the RHR to streamline regulatory requirements impacting states' visibility improvement obligations under the Clean Air Act (CAA).

Key facts

Document number: 2025-19280
Type: Proposed rule
Action: Advance notice of proposed rulemaking
Agency: Environmental Protection Agency
Published: October 2, 2025
Comments due: December 1, 2025
Dates: Comments must be received on or before December 1, 2025.
Docket: EPA-HQ-OAR-2025-1477; FRL-6714-04-OAR
Regulation ID (RIN): 2060-AU01
Code of Federal Regulations: 40 CFR 51
Topics: Administrative practice and procedure; Air pollution control; Environmental protection; Nitrogen dioxide; Particulate matter; Sulfur oxides; Transportation; Volatile organic compounds
Significant: Yes, under Executive Order 12866
Pages: 10

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on administrative practice and procedure · Rules on air pollution control · Rules on environmental protection · Published in October 2025

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.