# Review of the Ozone National Ambient Air Quality Standards
> **Rule** · Final action. · Published 2020-12-31 · Effective 2020-12-31 · 85 FR 87256
## Document
- **Document number:** 2020-28871
- **Category:** air-emissions
- **Federal Register citation:** 85 FR 87256
- **CFR reference:** 40 CFR 50
- **Publication date:** 2020-12-31
- **Effective date:** 2020-12-31
- **EPA docket:** EPA-HQ-OAR-2018-0279
## Abstract

Based on the Environmental Protection Agency's (EPA's) review of the air quality criteria and the national ambient air quality standards (NAAQS) for photochemical oxidants including ozone (O<INF>3</INF>), the EPA is retaining the current standards, without revision.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/12/31/2020-28871/review-of-the-ozone-national-ambient-air-quality-standards)
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