# Approval and Promulgation of Implementation Plans; Designation of Areas for Air Quality Planning Purposes; State of Arizona; Finding of Attainment for Rillito Particulate Matter of 10 Microns or Less (PM10) Nonattainment Area; Determination Regarding Applicability of Certain Clean Air Act Requirements; Correction
> **Rule** · Direct final rule. · Published 2006-08-08 · Effective 2006-10-10 · 71 FR 44920
## Document
- **Document number:** E6-12756
- **Category:** air-emissions
- **Federal Register citation:** 71 FR 44920
- **CFR reference:** 40 CFR 81
- **Publication date:** 2006-08-08
- **Effective date:** 2006-10-10
- **State:** AZ
- **EPA docket:** EPA-R09-OAR-2006-AZ-0388
## Abstract

EPA is taking direct final action to determine that the Rillito moderate PM<INF>10</INF> nonattainment area in Arizona attained the National Ambient Air Quality Standards for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM<INF>10</INF>) by the applicable attainment date. EPA also finds that the Rillito area is currently attaining the PM<INF>10</INF> standards, and based on this latter finding, EPA is determining that certain Clean Air Act requirements are not applicable for so long as the Rillito area continues to attain the PM<INF>10</INF> standards. Lastly, EPA is correcting an error in a previous rulemaking that involved the classification of PM<INF>10</INF> nonattainment areas within the State of Arizona.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/08/08/E6-12756/approval-and-promulgation-of-implementation-plans-designation-of-areas-for-air-quality-planning)
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