# Approval and Promulgation of Implementation Plans; California; South Coast Serious Area Plan for the 2006 PM2.5 NAAQS
> **Rule** · Final rule. · Published 2019-02-12 · Effective 2019-03-14 · 84 FR 3305
## Document
- **Document number:** 2019-01922
- **Category:** air-emissions
- **Federal Register citation:** 84 FR 3305
- **CFR reference:** 40 CFR 52
- **Publication date:** 2019-02-12
- **Effective date:** 2019-03-14
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2017-0490
## Abstract

The Environmental Protection Agency (EPA) is approving portions of a state implementation plan (SIP) revision submitted by California to address Clean Air Act (CAA or "Act") requirements for the 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS or "standards") in the Los Angeles-South Coast air basin (South Coast) Serious PM<INF>2.5</INF> nonattainment area. The EPA is also approving 2017 and 2019 motor vehicle emissions budgets for transportation conformity purposes and inter-pollutant trading ratios for use in transportation conformity analyses.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2019/02/12/2019-01922/approval-and-promulgation-of-implementation-plans-california-south-coast-serious-area-plan-for-the)
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