# Air Plan Approval and Designation of Areas; Kentucky; Redesignation of the Jefferson County 2010 1-Hour Sulfur Dioxide Nonattainment Area to Attainment
> **Rule** · Final rule. · Published 2020-08-06 · Effective 2020-09-08 · 85 FR 47670
## Document
- **Document number:** 2020-15598
- **Category:** air-emissions
- **Federal Register citation:** 85 FR 47670
- **CFR reference:** 40 CFR 52
- **Publication date:** 2020-08-06
- **Effective date:** 2020-09-08
- **State:** KY
- **EPA docket:** EPA-R04-OAR-2020-0003
## Abstract

In a letter dated December 9, 2019, the Commonwealth of Kentucky, through the Kentucky Division of Air Quality (KDAQ) on behalf of the Louisville Metro Air Pollution Control District (LMAPCD), submitted a request for the Environmental Protection Agency (EPA) to redesignate the Jefferson County sulfur dioxide (SO<INF>2</INF>) nonattainment area (hereinafter referred to as the "Jefferson County Area" or "Area") to attainment for the 2010 1-hour SO<INF>2</INF> primary national ambient air quality standard (NAAQS or standard) and to approve an accompanying state implementation plan (SIP) revision containing a maintenance plan for the Area. EPA is taking final action to determine that the Jefferson County Area has attained the 2010 1- hour SO<INF>2</INF> NAAQS; to approve the SIP revision containing the Commonwealth's plan for maintaining attainment of the 2010 1-hour SO<INF>2</INF> standard and to incorporate the maintenance plan into the SIP; and to redesignate the Jefferson County Area to attainment for the 2010 1-hour SO<INF>2</INF> NAAQS.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/08/06/2020-15598/air-plan-approval-and-designation-of-areas-kentucky-redesignation-of-the-jefferson-county-2010)
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