# Findings of Failure To Attain the 1997 PM2.5 Standards; California; San Joaquin Valley
> **Rule** · Final rule. · Published 2016-11-23 · Effective 2016-12-23 · 81 FR 84481
## Document
- **Document number:** 2016-28100
- **Category:** air-emissions
- **Federal Register citation:** 81 FR 84481
- **CFR reference:** 40 CFR 52
- **Publication date:** 2016-11-23
- **Effective date:** 2016-12-23
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2016-0494
## Abstract

The Environmental Protection Agency (EPA) has determined that the San Joaquin Valley nonattainment area failed to attain the 1997 annual and 24-hour fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards by the December 31, 2015 "Serious" area attainment date. As a result of this determination, the State of California is required to submit a revision to the California State Implementation Plan that, among other elements, provides for expeditious attainment of the 1997 PM<INF>2.5</INF> standards and for a five percent annual reduction in the emissions of direct PM<INF>2.5</INF> or a PM<INF>2.5</INF> plan precursor pollutant in the San Joaquin Valley.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/11/23/2016-28100/findings-of-failure-to-attain-the-1997-pm25-standards-california-san-joaquin-valley)
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