# san-francisco-bay-area-ca-marginal · CALIFORNIA · Sonoma County · 8-Hour Ozone (2015) — Current EPA nonattainment county designations by pollutant

For san-francisco-bay-area-ca-marginal · CALIFORNIA · Sonoma County · 8-Hour Ozone (2015), pollutant / naaqs is 8-Hour Ozone (2015); nonattainment area name is San Francisco Bay Area, CA - (Marginal); partial county is yes; county or area is Sonoma County; state is CALIFORNIA; data current as of is August 31, 2026, recorded from its source on 2026-08-31.

- **Row ID:** san-francisco-bay-area-ca-marginal _(our reading, not quoted from the source)_
- **State:** CALIFORNIA _(our reading, not quoted from the source)_
- **County or area:** Sonoma County _(verified: appears in the quote below)_
- **Pollutant / NAAQS:** 8-Hour Ozone (2015) _(verified: appears in the quote below)_
- **Partial county:** yes _(our reading, not quoted from the source)_
- **Nonattainment area name:** San Francisco Bay Area, CA - (Marginal) _(verified: appears in the quote below)_
- **Data current as of:** August 31, 2026 _(verified: appears in the quote below)_

## What the source says

> Sonoma County | PM-2.5 (2006) | * | San Francisco Bay Area, CA - (Moderate) | 8-Hour Ozone (2008) | * | San Francisco Bay Area, CA - (Marginal) | 8-Hour Ozone (2015) | * | San Francisco Bay Area, CA - (Marginal)

## Source

- https://www3.epa.gov/airquality/greenbook/ancl.html

Last verified: 2026-08-31. Review by: 2027-02-27.
Part of [Current EPA nonattainment county designations by pollutant](https://referencesource.org/nonattainment-county-designations-by-pollutant/).