Worst air pollution Stockton, today and tomorrow
Today (9 August): Air quality in Stockton is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (O3: 32.2/100).
Tomorrow (10 August 2026): Air quality in Stockton is fair. All pollutants stay as today. Pollution peaks around 5:00 AM (O3: 37.0/100). 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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Stockton's air quality reflects the San Joaquin Valley's enclosed basin position, sharing Fresno and Bakersfield's notorious pollution trap with the addition of the Sacramento-San Joaquin River Delta's agricultural burning contributing regional emissions. The Delta breeze from San Francisco Bay provides afternoon ventilation during summer, offering some relief from the valley inversion that traps vehicle and agricultural emissions throughout most of the year.
Today - 9 August | Pollution peaks at 06:00
AQI:
Fair
32.2/100
PM2.5 (fine particles):
Good
12.6/100
PM10 (coarse particles):
Good
4.7/100
NO2 (nitrogen dioxide):
Good
3.2/100
O3 (ozone):
Fair
32.2/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.1/100
PM1 (ultrafine particles):
Good
8.6/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 05:00
AQI:
Fair
37.0/100
PM2.5 (fine particles):
Good
10.1/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Good
1.9/100
O3 (ozone):
Fair
37.0/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.0/100
PM1 (ultrafine particles):
Good
6.8/100
Pollen forecast in Stockton
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Stockton
Frequently Asked Questions
Is air quality bad in Stockton right now?
On 9 August 2026, overall air quality in Stockton is fair. AQI is the main air quality indicator at 32.2/100. Pollution peaks around 6:00 AM (O3: 32.2/100).
Will air quality be worse tomorrow in Stockton?
On 10 August 2026, air quality conditions in Stockton will be similar to today, with AQI forecast at fair at 37.0/100. Pollution peaks around 5:00 AM (O3: 37.0/100).
When is air pollution at its worst in Stockton?
Seasonal changes shape air quality across Stockton: the rainy winter months generally bring the cleanest air, as storms clear traffic and woodsmoke pollution, but the long dry stretch from midsummer into autumn brings both ozone and wildfire smoke risk. Dry summer conditions with virtually no rain mean pollution and smoke can linger for extended stretches once they arrive.
Are air quality levels in Stockton 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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