Worst air pollution Petaluma, today and tomorrow
Today (15 July): Air quality in Petaluma 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 Petaluma is fair. PM2.5 increases to fair; NO2 increases to fair; all other 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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Petaluma's air quality reflects the Petaluma River valley's partial coastal enclosure between the Sonoma Mountains and the Marin coastal range, with the Petaluma Gap providing the primary Pacific sea breeze ventilation corridor from San Francisco Bay. Vehicle emissions from US-101 are the primary local source, while summer wildfire smoke from the surrounding Wine Country ranges is a severe and recurring seasonal concern and the valley's geographic position as a key Bay Area wind corridor generally provides reasonable ventilation throughout the year.
Today - 15 July | Pollution peaks at 10:00
AQI:
Fair
33.8/100
PM2.5 (fine particles):
Good
12.7/100
PM10 (coarse particles):
Good
8.6/100
NO2 (nitrogen dioxide):
Good
19.0/100
O3 (ozone):
Fair
33.8/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
7.5/100
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):
Fair
20.1/100
PM10 (coarse particles):
Good
11.0/100
NO2 (nitrogen dioxide):
Fair
28.8/100
O3 (ozone):
Fair
32.8/100
SO2 (sulfur dioxide):
Good
4.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.7/100
PM1 (ultrafine particles):
Good
13.8/100
Pollen forecast in Petaluma
View pollen forecastFrequently Asked Questions
Is air quality bad in Petaluma right now?
On 15 July 2026, overall air quality in Petaluma 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 Petaluma?
On 16 July 2026, air quality conditions in Petaluma 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 Petaluma?
Air quality in Petaluma shifts across the year. In short, the shortest stretch of clean air usually falls in the wetter winter months, whereas from August into October, wildfire smoke can add sharp particulate spikes on top of the usual summer ozone. The mountains ringing the basin can trap pollution close to the ground for days when winds are calm.
Are air quality levels in Petaluma 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