# Approval and Promulgation of Implementation Plans; State of Iowa
> **Rule** · Final rule. · Published 1997-12-01 · Effective 1997-12-31 · 62 FR 63454
## Document
- **Document number:** 97-31410
- **Category:** air-emissions
- **Federal Register citation:** 62 FR 63454
- **CFR reference:** 40 CFR 52
- **Publication date:** 1997-12-01
- **Effective date:** 1997-12-31
- **State:** IA
- **EPA docket:** IA 036-1036
## Abstract

The EPA is taking final action to approve an Iowa State Implementation Plan (SIP) revision pertaining to the Muscatine, Iowa, sulfur dioxide (SO<INF>2</INF>) nonattainment area. This action will make federally enforceable state permits and related source specific emission limits and other conditions which will ensure attainment and maintenance of the SO<INF>2</INF> National Ambient Air Quality Standards (NAAQS).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/12/01/97-31410/approval-and-promulgation-of-implementation-plans-state-of-iowa)
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