# Approval and Promulgation of Implementation Plan; Michigan Detroit-Ann Arbor NOINFX Exemption
> **Rule** · Final rule. · Published 1995-03-07 · Effective 1995-04-06 · 60 FR 12446
## Document
- **Document number:** 95-5444
- **Category:** air-emissions
- **Federal Register citation:** 60 FR 12446
- **CFR reference:** 40 CFR 52
- **Publication date:** 1995-03-07
- **Effective date:** 1995-04-06
- **State:** MI
- **EPA docket:** MI26-04-6805
## Abstract

The Environmental Protection Agency is granting an exemption to the Detroit-Ann Arbor ozone nonattainment area from applicable oxides of nitrogen (NO<INF>X) requirements found in the Clean Air Act (Act). Approval of the exemption would apply for various NO<INF>X requirements including adoption and implementation of regulations addressing general conformity, transportation conformity, inspection and maintenance, reasonably available control technology, and new source review. The State of Michigan submitted a NO<INF>X exemption request on November 12, 1993. A subsequent letter dated May 31, 1994 clarified this earlier submittal. This request is based on the fact that ozone monitoring in the Detroit-Ann Arbor area indicates that the average number of exceedances of the National Ambient Air Quality Standard for ozone during the most recent 3-year period, 1991 to 1993, is fewer than one per year. Given this monitoring data, Michigan petitioned for an exemption from the NO<INF>X requirements based on a demonstration that additional reductions of NO<INF>X would not contribute to attainment of the ozone standard.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1995/03/07/95-5444/approval-and-promulgation-of-implementation-plan-michigan-detroit-ann-arbor-noinfx-exemption)
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