# Determination of Attainment for the Chico Nonattainment Area for the 2006 Fine Particle Standard; California; Determination Regarding Applicability of Clean Air Act Requirements
> **Rule** · Final rule. · Published 2013-09-10 · Effective 2013-10-10 · 78 FR 55225
## Document
- **Document number:** 2013-21877
- **Category:** air-emissions
- **Federal Register citation:** 78 FR 55225
- **CFR reference:** 40 CFR 52
- **Publication date:** 2013-09-10
- **Effective date:** 2013-10-10
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2012-0800
## Abstract

EPA is taking final action to determine that the Chico nonattainment area in Butte County, California has attained the 2006 24-hour fine particle (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS or standard). This determination is based upon complete, quality-assured, and certified ambient air monitoring data showing that this area has monitored attainment of the 2006 24-hour PM<INF>2.5</INF> NAAQS based on the 2010-2012 monitoring period. Based on the above determination, the requirements for this area to submit an attainment demonstration, together with reasonably available control measures, a reasonable further progress (RFP) plan, and contingency measures for failure to meet RFP and attainment deadlines are suspended for so long as the area continues to attain the 2006 24-hour PM<INF>2.5</INF> NAAQS.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/09/10/2013-21877/determination-of-attainment-for-the-chico-nonattainment-area-for-the-2006-fine-particle-standard)
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