# Approval and Promulgation of Air Quality Implementation Plans; Michigan; PSD Rules for PM2.5
> **Rule** · Direct Final Rule. · Published 2014-04-04 · Effective 2014-06-03 · 79 FR 18802
## Document
- **Document number:** 2014-06825
- **Category:** air-emissions
- **Federal Register citation:** 79 FR 18802
- **CFR reference:** 40 CFR 52
- **Publication date:** 2014-04-04
- **Effective date:** 2014-06-03
- **State:** MI
- **EPA docket:** EPA-R05-OAR-2013-0646
## Abstract

The Environmental Protection Agency (EPA) is approving revisions to Michigan's Prevention of Significant Deterioration (PSD) Program rules and definitions, including revisions to Parts 1 and 18 of Michigan's Air Pollution Control Rules into Michigan's State Implementation Plan (SIP). The revised rules address the Federal requirements for significant emission levels, and definitions for fine particulate matter (PM<INF>2.5</INF>). The Michigan Department of Environmental Quality (MDEQ) submitted these revisions to EPA on August 9, 2013, and September 19, 2013.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/04/04/2014-06825/approval-and-promulgation-of-air-quality-implementation-plans-michigan-psd-rules-for-pm25)
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