# Air Plan Approval; Illinois; Indiana; Revised Designation of Illinois and Indiana 2012 PM2.5 Unclassifiable Areas
> **Rule** · Final rule. · Published 2018-12-27 · Effective 2019-01-28 · 83 FR 66631
## Document
- **Document number:** 2018-27903
- **Category:** air-emissions
- **Federal Register citation:** 83 FR 66631
- **CFR reference:** 40 CFR 81
- **Publication date:** 2018-12-27
- **Effective date:** 2019-01-28
- **State:** IL
- **EPA docket:** EPA-R05-OAR-2018-0368
## Abstract

The Environmental Protection Agency (EPA) is approving Illinois' May 8, 2018 request to revise the designation for the entire State of Illinois from unclassifiable to unclassifiable/attainment and Indiana's July 3, 2018 request to revise the designation for the Indiana portions of the Chicago IL-IN and Louisville KY-IN areas from unclassifiable to unclassifiable/attainment for the 2012 primary and secondary annual fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standards (NAAQS). EPA is approving these requests because valid, quality-assured, and certified ambient air monitoring data show that the PM<INF>2.5</INF> monitors in the areas are meeting the 2012 primary and secondary annual PM<INF>2.5</INF> NAAQS.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/12/27/2018-27903/air-plan-approval-illinois-indiana-revised-designation-of-illinois-and-indiana-2012-pm25)
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