# Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Indiana; Redesignation of Lake and Porter Counties to Attainment for Ozone
> **Rule** · Final rule. · Published 2010-05-11 · Effective 2010-05-11 · 75 FR 26113
## Document
- **Document number:** 2010-11009
- **Category:** air-emissions
- **Federal Register citation:** 75 FR 26113
- **CFR reference:** 40 CFR 52
- **Publication date:** 2010-05-11
- **Effective date:** 2010-05-11
- **State:** IN
- **EPA docket:** EPA-R05-OAR-2009-0512
## Abstract

EPA is taking several related actions affecting Lake and Porter Counties and the State of Indiana for the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS or standard). EPA is approving a request from the State of Indiana to redesignate Lake and Porter Counties, the Indiana portion of the Chicago-Gary-Lake County, Illinois-Indiana (IL-IN) 8-hour ozone nonattainment area, to attainment of the 1997 8-hour ozone NAAQS. In addition, EPA is approving, as a revision to the Indiana State Implementation Plan (SIP), the State's plan for maintaining the 1997 8-hour ozone NAAQS through 2020 in Lake and Porter Counties and in the Chicago-Gary-Lake County, IL-IN ozone nonattainment area. EPA is also approving the 2002 Volatile Organic Compounds (VOC) and Nitrogen Oxides (NO<INF>X</INF>) emission inventories for Lake and Porter Counties as a SIP revision and as meeting the requirements of the Clean Air Act (CAA). Finally, EPA finds adequate and is approving the State's 2010 and 2020 VOC and NO<INF>X</INF> Motor Vehicle Emission Budgets (MVEBs) for Lake and Porter Counties.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/05/11/2010-11009/approval-and-promulgation-of-implementation-plans-and-designation-of-areas-for-air-quality-planning)
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