Worst air pollution Santa Rosa, today and tomorrow
Today (15 July): Air quality in Santa Rosa is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (O3: 33.8/100).
Tomorrow (16 July 2026): Air quality in Santa Rosa is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 32.8/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Santa Rosa's air quality in California reflects the Santa Rosa plain's partial topographic enclosure between the Mayacamas Mountains to the east and the Sonoma Mountains to the west, with vehicle emissions from US-101 the primary local source. Wildfire smoke from the surrounding Wine Country ranges is a severe and recurring seasonal concern — the 2017 Tubbs Fire burned through the city itself — while the Petaluma Gap winds from San Francisco Bay provide afternoon ventilation on most summer days.
Today - 15 July | Pollution peaks at 10:00
AQI:
Fair
33.8/100
PM2.5 (fine particles):
Good
9.9/100
PM10 (coarse particles):
Good
6.7/100
NO2 (nitrogen dioxide):
Good
6.8/100
O3 (ozone):
Fair
33.8/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
5.9/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 12:00
AQI:
Fair
32.8/100
PM2.5 (fine particles):
Good
15.8/100
PM10 (coarse particles):
Good
8.5/100
NO2 (nitrogen dioxide):
Good
11.5/100
O3 (ozone):
Fair
32.8/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.7/100
PM1 (ultrafine particles):
Good
10.8/100
Pollen forecast in Santa Rosa
View pollen forecastFrequently Asked Questions
Is air quality bad in Santa Rosa right now?
On 15 July 2026, overall air quality in Santa Rosa is fair. AQI is the main air quality indicator at 33.8/100. Pollution peaks around 10:00 AM (O3: 33.8/100).
Will air quality be worse tomorrow in Santa Rosa?
On 16 July 2026, air quality conditions in Santa Rosa will be similar to today, with AQI forecast at fair at 32.8/100. Pollution peaks around 12:00 PM (O3: 32.8/100).
When is air pollution at its worst in Santa Rosa?
Santa Rosa sees air quality change through the year — spring typically offers the best combination of mild weather and clear air, whereas wildfire smoke season from July through October is the dominant concern, sometimes overwhelming other pollution sources for days at a time. Wine country and inland valley locations tend to see more smoke buildup than the immediate coast.
Are air quality levels in Santa Rosa based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app