# Approval and Promulgation of Implementation Plans: Wisconsin: Kewaunee County Ozone Maintenance Plan Update
> **Rule** · Direct final rule. · Published 2004-05-10 · Effective 2004-07-09 · 69 FR 25835
## Document
- **Document number:** 04-10341
- **Category:** air-emissions
- **Federal Register citation:** 69 FR 25835
- **CFR reference:** 40 CFR 52
- **Publication date:** 2004-05-10
- **Effective date:** 2004-07-09
- **State:** WI
- **EPA docket:** WI119-01a
## Abstract

The EPA is approving a revision to the plan prepared by Wisconsin to maintain the one-hour national ambient air quality standard (NAAQS) for ozone in the Kewaunee County maintenance area through the year 2012. Wisconsin's submitted the revision on January 28, 2003, and supplemented it on February 5, 2003 and February 27, 2003. This revision is required by the Clean Air Act. The effect of this approval is to ensure federal enforceability of the state air program plan and to maintain consistency between the state-adopted plan and the approved State Implementation Plan (SIP).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/05/10/04-10341/approval-and-promulgation-of-implementation-plans-wisconsin-kewaunee-county-ozone-maintenance-plan)
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