# Approval of Missouri Air Quality Implementation Plans; Redesignation of the Missouri Portion of the St. Louis-St. Charles-Farmington, MO-IL 2008 Ozone Area to Attainment
> **Rule** · Final rule. · Published 2018-09-20 · Effective 2018-09-20 · 83 FR 47572
## Document
- **Document number:** 2018-20326
- **Category:** air-emissions
- **Federal Register citation:** 83 FR 47572
- **CFR reference:** 40 CFR 52
- **Publication date:** 2018-09-20
- **Effective date:** 2018-09-20
- **State:** MO
- **EPA docket:** EPA-R07-OAR-2017-0349
## Abstract

The Environmental Protection Agency (EPA) is taking final action to redesignate the Missouri portion of the St. Louis-St. Charles-Farmington, MO-IL nonattainment area ("St. Louis area" or "area") to attainment for the 2008 ozone National Ambient Air Quality Standard (NAAQS). EPA is also approving, as a revision to the Missouri State Implementation Plan (SIP), the state's plan for maintaining the 2008 8-hour ozone NAAQS through 2030. Finally, EPA finds adequate and is approving, as a SIP revision, the State's 2030 volatile organic compound (VOC) and oxides of nitrogen (NO<INF>X</INF>) Motor Vehicle Emission Budgets (MVEBs) for the Missouri portion of the St. Louis area. The Missouri Department of Natural Resources (MDNR) submitted this request on September 12, 2016, with a supplemental submission on February 16, 2018. EPA addressed the Illinois portion of the St. Louis area in a separate rulemaking action published in the Federal Register on March 1, 2018.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/09/20/2018-20326/approval-of-missouri-air-quality-implementation-plans-redesignation-of-the-missouri-portion-of-the)
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