# Approval and Promulgation of Implementation Plans; and Designation of Areas for Air Quality Planning Purposes; State of Iowa
> **Rule** · Direct final rule. · Published 1998-03-19 · Effective 1998-05-18 · 63 FR 13343
## Document
- **Document number:** 98-7133
- **Category:** air-emissions
- **Federal Register citation:** 63 FR 13343
- **CFR reference:** 40 CFR 52
- **Publication date:** 1998-03-19
- **Effective date:** 1998-05-18
- **State:** IA
- **EPA docket:** IA 040-1040(a)
## Abstract

In this action, the EPA is approving a request by the state of Iowa to redesignate to attainment the portion of Muscatine County currently designated as nonattainment for the sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS). With this approval, the entire state of Iowa will be in attainment status for SO<INF>2</INF>. The EPA is also approving the maintenance plan for the Muscatine County nonattainment area which was submitted to ensure that attainment of the NAAQS will be maintained.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/03/19/98-7133/approval-and-promulgation-of-implementation-plans-and-designation-of-areas-for-air-quality-planning)
---
*AI Analytics · CC0 1.0*