# Approval and Promulgation of Implementation Plans; State of Iowa
> **Rule** · Direct final rule. · Published 2007-08-01 · Effective 2007-10-01 · 72 FR 41900
## Document
- **Document number:** E7-14868
- **Category:** air-emissions
- **Federal Register citation:** 72 FR 41900
- **CFR reference:** 40 CFR 52
- **Publication date:** 2007-08-01
- **Effective date:** 2007-10-01
- **State:** IA
- **EPA docket:** EPA-R07-OAR-2007-0477
## Abstract

EPA is approving a State Implementation Plan (SIP) revision submitted by the state of Iowa for maintenance of the sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS) in Muscatine, Iowa.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/08/01/E7-14868/approval-and-promulgation-of-implementation-plans-state-of-iowa)
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