Data / Federal rules / 2025-04906

Air Plan Approval; ID; Regional Haze Plan for the Second Implementation Period

The Environmental Protection Agency published this proposed rule in the Federal Register on March 24, 2025. Comments closed on April 23, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to approve the Idaho regional haze State Implementation Plan (SIP) revision submitted on August 5, 2022, and supplemented on May 8, 2024. Idaho submitted the SIP revision to address the requirement to make reasonable progress toward the national goal of preventing any future, and remedying any existing, anthropogenic impairment of visibility in certain national parks and wilderness areas.

Key facts

Document number: 2025-04906
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: March 24, 2025
Comments due: April 23, 2025
Dates: Written comments must be received on or before April 23, 2025.
Docket: EPA-R10-OAR 2024-0545; FRL-11879-01-R10
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
Pages: 34

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Rules on incorporation by reference · Published in March 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.