# Finding of Failure To Attain the 2006 24-Hour Fine Particulate Matter Standards; California; Los Angeles-South Coast Air Basin
> **Rule** · Final rule. · Published 2020-09-16 · Effective 2020-10-16 · 85 FR 57733
## Document
- **Document number:** 2020-19588
- **Category:** air-emissions
- **Federal Register citation:** 85 FR 57733
- **CFR reference:** 40 CFR 52
- **Publication date:** 2020-09-16
- **Effective date:** 2020-10-16
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2020-0309
## Abstract

The Environmental Protection Agency (EPA) has determined that the Los Angeles-South Coast Air Basin nonattainment area failed to attain the 2006 24-hour fine particulate matter ("PM<INF>2.5</INF>") national ambient air quality standards by the December 31, 2019 "Serious" area attainment date. This determination is based on ambient air quality monitoring data from 2017 through 2019. As a result of this determination, the State of California is required to submit a revision to the California State Implementation Plan (SIP) that, among other elements, provides for expeditious attainment within the time limits prescribed by regulation and provides 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. We are also correcting an error in the table of California area designations for the 2006 PM<INF>2.5</INF> national ambient air quality standards.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/09/16/2020-19588/finding-of-failure-to-attain-the-2006-24-hour-fine-particulate-matter-standards-california-los)
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