# Approval and Promulgation of Air Quality Implementation Plans; Montana; Whitefish PM10 Nonattainment Area Control Plan
> **Rule** · Direct final rule. · Published 2008-04-24 · Effective 2008-06-23 · 73 FR 22057
## Document
- **Document number:** E8-8862
- **Category:** air-emissions
- **Federal Register citation:** 73 FR 22057
- **CFR reference:** 40 CFR 52
- **Publication date:** 2008-04-24
- **Effective date:** 2008-06-23
- **State:** MT
- **EPA docket:** EPA-R08-OAR-2007-0367
## Abstract

EPA is taking direct final action approving State Implementation Plan (SIP) revisions submitted by the Governor of Montana on June 26, 1997, and June 13, 2000. (Portions of the June 26, 1997 submittal were withdrawn by the Governor of Montana on February 8, 1999). These revisions contain an inventory of emissions for Whitefish and establish and require continuation of all control measures adopted and implemented for reductions of particulate aerodynamic diameter less than or equal to 10 micrometers (PM<INF>10</INF>) in order to attain the PM<INF>10</INF> National Ambient Air Quality Standards (NAAQS) in Whitefish. Using the PM<INF>10</INF> clean data areas approach, we are approving the control measures and the emissions inventory that were submitted as part of the PM<INF>10</INF> nonattainment area SIP for Whitefish. This action is being taken under section 110 of the Clean Air Act (CAA or Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2008/04/24/E8-8862/approval-and-promulgation-of-air-quality-implementation-plans-montana-whitefish-pm10-nonattainment)
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