# Approval and Promulgation of Air Quality Implementation Plans; Indiana; Sulfur Dioxide and Nitrogen Dioxide Ambient Air Quality Standards
> **Rule** · Direct final rule. · Published 2013-05-14 · Effective 2013-07-15 · 78 FR 28143
## Document
- **Document number:** 2013-11296
- **Category:** air-emissions
- **Federal Register citation:** 78 FR 28143
- **CFR reference:** 40 CFR 52
- **Publication date:** 2013-05-14
- **Effective date:** 2013-07-15
- **State:** IN
- **EPA docket:** EPA-R05-OAR-2011-0406
## Abstract

EPA is approving a request submitted by the Indiana Department of Environmental Management (IDEM) on April 15, 2011, and supplemented on January 30, 2013, to revise the Indiana state implementation plan (SIP) for nitrogen dioxide (NO<INF>2</INF>) and sulfur dioxide (SO<INF>2</INF>) under the Clean Air Act (CAA). This submittal consists of revisions to the Indiana Administrative Code (IAC) that amend the national ambient air quality standards (NAAQS) for NO<INF>2</INF> and SO<INF>2</INF> to be consistent with the NAAQS that EPA promulgated in 2010.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/05/14/2013-11296/approval-and-promulgation-of-air-quality-implementation-plans-indiana-sulfur-dioxide-and-nitrogen)
---
*AI Analytics · CC0 1.0*