Data / Federal rules / 2025-20197

Air Plan Approval; IA, Muscatine; 2010 1-Hour SO2 Maintenance Plan and Redesignation

The Environmental Protection Agency published this final rule in the Federal Register on November 18, 2025. It took effect on December 18, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is taking final action to redesignate the nonattainment area in Muscatine County, Iowa to attainment for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS). The EPA is also approving Iowa's maintenance plan for the 2010 1-hour SO<INF>2</INF> NAAQS for the Muscatine nonattainment area and approving modifications to source-specific permits in the Iowa State Implementation Plan (SIP). The EPA is taking this action in accordance with the requirements of the Clean Air Act (CAA).

Key facts

Document number: 2025-20197
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: November 18, 2025
Takes effect: December 18, 2025
Dates: This final rule is effective on December 18, 2025.
Docket: EPA-R07-OAR-2025-0818; FRL-12901-02-R7
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
Pages: 6

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 November 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.