# Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes: Ada County/Boise, ID Area
> **Rule** · Final rule. · Published 2003-10-27 · 68 FR 61106
## Document
- **Document number:** 03-26919
- **Category:** air-emissions
- **Federal Register citation:** 68 FR 61106
- **CFR reference:** 40 CFR 52
- **Publication date:** 2003-10-27
- **EPA docket:** ID-02-003
## Abstract

The Environmental Protection Agency (EPA or Agency) is taking final action to rescind its earlier finding that the PM<INF>10</INF> standards promulgated on July 1, 1987 and the accompanying nonattainment designation and classification are no longer applicable in the Ada County/Boise, Idaho area, and simultaneously, approve a PM<INF>10</INF> State Implementation Plan maintenance plan for the Ada County/Boise Idaho area and to redesignate the area from nonattainment to attainment. PM<INF>10</INF> air pollution is suspended particulate matter with a diameter less than or equal to a nominal ten micrometers.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/10/27/03-26919/approval-and-promulgation-of-implementation-plans-and-designation-of-areas-for-air-quality-planning)
---
*AI Analytics · CC0 1.0*