# Finding of Substantial Inadequacy of Implementation Plan; Call for Iowa State Implementation Plan Revision
> **Rule** · Final rule. · Published 2011-07-14 · Effective 2011-08-15 · 76 FR 41424
## Document
- **Document number:** 2011-17235
- **Category:** air-emissions
- **Federal Register citation:** 76 FR 41424
- **CFR reference:** 40 CFR 52
- **Publication date:** 2011-07-14
- **Effective date:** 2011-08-15
- **State:** IA
- **EPA docket:** EPA-R07-OAR-2010-1083
## Abstract

Pursuant to the Environmental Protection Agency's (EPA) authority in the Clean Air Act (CAA or Act), section 110(k)(5), to call for plan revisions, EPA is making a finding that the Iowa State Implementation Plan (SIP) is substantially inadequate to maintain the 2006 24-hour National Ambient Air Quality Standard (NAAQS) for Fine Particulate Matter (PM<INF>2.5</INF>) in Muscatine County, Iowa. The specific SIP deficiencies needing revision are described below. EPA is also finalizing a timeline for Iowa to revise its SIP to correct these deficiencies by a date which is no later than 18 months after the effective date of this rule.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/07/14/2011-17235/finding-of-substantial-inadequacy-of-implementation-plan-call-for-iowa-state-implementation-plan)
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