# Denial of Request for Extension of Attainment Date for 1997 PM2.5 NAAQS; California; San Joaquin Valley Serious Nonattainment Area
> **Rule** · Final rule. · Published 2016-10-06 · Effective 2016-11-07 · 81 FR 69396
## Document
- **Document number:** 2016-24082
- **Category:** air-emissions
- **Federal Register citation:** 81 FR 69396
- **CFR reference:** 40 CFR 52
- **Publication date:** 2016-10-06
- **Effective date:** 2016-11-07
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2015-0432
## Abstract

The Environmental Protection Agency (EPA) is denying a request submitted by California for extension of the attainment date for the 1997 24-hour and annual fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards in the San Joaquin Valley Serious PM<INF>2.5</INF> nonattainment area.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/10/06/2016-24082/denial-of-request-for-extension-of-attainment-date-for-1997-pm25-naaqs-california-san-joaquin-valley)
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