# Approval and Promulgation of Air Quality Implementation Plans; Illinois; Regional Haze
> **Rule** · Final rule. · Published 2012-07-06 · Effective 2012-08-06 · 77 FR 39943
## Document
- **Document number:** 2012-16557
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 39943
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-07-06
- **Effective date:** 2012-08-06
- **State:** IL
- **EPA docket:** EPA-R05-OAR-2011-0598
## Abstract

EPA is approving revisions to the Illinois State Implementation Plan, submitted on June 24, 2011, addressing regional haze for the first implementation period. EPA received comments disputing its proposed finding regarding best available retrofit technology, but EPA continues to believe that Illinois' plan limits power plant emissions as well as would be achieved by directly requiring best available retrofit technology. Therefore, EPA finds that the Illinois regional haze plan satisfactorily addresses Clean Air Act section 169A and Regional Haze Rule requirements for states to remedy any existing and prevent future anthropogenic impairment of visibility at mandatory Class I areas. EPA is also approving two state rules and incorporating two permits into the state implementation plan.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/07/06/2012-16557/approval-and-promulgation-of-air-quality-implementation-plans-illinois-regional-haze)
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