# Finding of Failure To Attain; California-Imperial Valley Nonattainment Area; PM-10
> **Rule** · Final rule. · Published 2007-12-11 · Effective 2008-01-10 · 72 FR 70222
## Document
- **Document number:** E7-23943
- **Category:** air-emissions
- **Federal Register citation:** 72 FR 70222
- **CFR reference:** 40 CFR 81
- **Publication date:** 2007-12-11
- **Effective date:** 2008-01-10
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2005-CA-0017
## Abstract

EPA is finding that the Imperial Valley serious PM-10 nonattainment area did not attain the 24-hour particulate matter (PM- 10) National Ambient Air Quality Standard (NAAQS) by the deadline mandated in the Clean Air Act (CAA), December 31, 2001. In response to this finding, the State of California must submit a revision to the California State Implementation Plan (SIP) that provides for attainment of the PM-10 standard in the Imperial Valley area and at least five percent annual reductions in PM-10 or PM-10 precursor emissions until attainment as required by CAA section 189(d). The State must submit the SIP revision by December 11, 2008.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/12/11/E7-23943/finding-of-failure-to-attain-california-imperial-valley-nonattainment-area-pm-10)
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