Data / Federal rules / 2025-18594

Air Plan Approval; Indiana; Huntington County 2010 Sulfur Dioxide Redesignation and Maintenance Plan

The Environmental Protection Agency published this proposed rule in the Federal Register on September 25, 2025. Comments closed on October 27, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to find that Huntington Township, Indiana (referred to in this proposed rule as the Huntington County, Indiana area) is attaining the 2010 sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS) and to propose approval of Indiana's request to redesignate the area to attainment for the 2010 SO<INF>2</INF> NAAQS, because the request meets the statutory requirements for redesignation under the Clean Air Act (CAA). EPA is also proposing to approve Indiana's maintenance plan for the area, which, once approved, will become part of Indiana's federally enforceable State Implementation Plan (SIP).

Key facts

Document number: 2025-18594
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: September 25, 2025
Comments due: October 27, 2025
Dates: Comments must be received on or before October 27, 2025.
Docket: EPA-R05-OAR-2024-0378; FRL-12933-01-R5
Code of Federal Regulations: 40 CFR 52; 40 CFR 81
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Reporting and recordkeeping requirements; Sulfur oxides; Wilderness areas
Pages: 5

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 September 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.