# 2025-15990: Sacramento Wins Clean Air Badge from EPA

2025-15990, Determination of Attainment by the Attainment Date; 2008 8-Hour Ozone Standards; California; Sacramento Metro Area, is a Federal Register rule from Environmental Protection Agency published 2025-08-21, effective The Sacramento Metro area attained the 2008 8-hour ozone NAAQS by its December 31, 2024 attainment date based on quality-assured and certified ambient air quality monitoring data from 2022 through 2024. (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2025-15990
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-15990
- Title: Determination of Attainment by the Attainment Date; 2008 8-Hour Ozone Standards; California; Sacramento Metro Area
- Type: Rule
- Agencies: Environmental Protection Agency
- Citation: 90 FR 40741
- Published: 2025-08-21
- Effective: The Sacramento Metro area attained the 2008 8-hour ozone NAAQS by its December 31, 2024 attainment date based on quality-assured and certified ambient air quality monitoring data from 2022 through 2024.
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-11

## In one line

Sacramento Wins Clean Air Badge from EPA

## Summary

Great news for Sacramento! The EPA confirms the area met clean air goals for ozone by the end of 2024, thanks to solid air quality improvements from 2022 to 2024. This means California won’t need to add extra backup plans to keep ozone levels down, saving time and resources while keeping the air fresh.

## Abstract

The Environmental Protection Agency (EPA) is finalizing our determination that the Sacramento Metro, California area attained the 2008 8-hour ozone national ambient air quality standards (NAAQS) by its December 31, 2024 attainment date. This determination is based on quality-assured and certified ambient air quality monitoring data from 2022 through 2024. We are also finalizing a determination that the requirement for the State to have contingency measures for reasonable further progress (RFP) and attainment for the 2008 ozone NAAQS no longer applies for this area.

## Effects PRIA read

- Sacramento met 2008 ozone standard: benefit, low. The EPA finalized that the Sacramento Metro area attained the 2008 8-hour ozone national ambient air quality standard by its December 31, 2024 attainment date, based on certified monitoring data from 2022 through 2024. This means the area is officially recorded as meeting that ozone standard.
- Contingency measures requirement lifted: benefit, low. The EPA finalized that the State's requirement to have contingency measures for reasonable further progress (RFP) and attainment for the 2008 ozone NAAQS no longer applies to the Sacramento Metro area. That removes the obligation for the State to maintain those contingency plans for this area tied…

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## Sources
- [2025-15990 on federalregister.gov](https://www.federalregister.gov/documents/2025/08/21/2025-15990/determination-of-attainment-by-the-attainment-date-2008-8-hour-ozone-standards-california-sacramento)
- [2025-15990 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-08-21/pdf/2025-15990.pdf)

## Related
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- [Next: 2025-15991, Adequacy Status of the Klamath Falls, Oregon Submitted 2006 24-Hour PM2.5 NAAQS…](https://policyrisk.com/federal-register/2025-15991)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-15990 (as of 2026-06-11).