# Air Plan Approval; Illinois; Alton Township 2010 Sulfur Dioxide Redesignation and Maintenance Plan
> **Rule** · Final rule. · Published 2024-12-30 · Effective 2025-01-29 · 89 FR 106357
## Document
- **Document number:** 2024-30506
- **Category:** air-emissions
- **Federal Register citation:** 89 FR 106357
- **CFR reference:** 40 CFR 52
- **Publication date:** 2024-12-30
- **Effective date:** 2025-01-29
- **State:** IL
- **EPA docket:** EPA-R05-OAR-2023-0498
## Abstract

The Environmental Protection Agency (EPA) is approving Illinois' request to redesignate the Alton Township nonattainment area in Madison County, Illinois to attainment for the 2010 sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS). EPA is also approving Illinois' maintenance plan for the area. Illinois submitted the request for approval on October 2, 2023. Additionally, EPA is taking final action to determine that the Alton Township area attained the 2010 SO<INF>2</INF> NAAQS by the September 12, 2021, attainment date, fulfilling EPA's obligation under the Clean Air Act (CAA) section 179(c) to determine whether the area attained the relevant NAAQS standard. EPA proposed to approve this action on October 8, 2024, and received no comments.December 30, 2024

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/12/30/2024-30506/air-plan-approval-illinois-alton-township-2010-sulfur-dioxide-redesignation-and-maintenance-plan)
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