Worst air pollution San Bernardo, today and tomorrow
Today (9 August): Air quality in San Bernardo is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (O3: 18.2/100).
Tomorrow (10 August 2026): Air quality in San Bernardo is good. All pollutants stay as today. Pollution peaks around 4:00 AM (O3: 18.5/100). 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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San Bernardo's air quality reflects the Santiago metropolitan area's southern residential corridor at 560 metres in the Central Valley, with vehicle traffic on surrounding roads and the dense urban residential and light industrial character contributing local sources under the Santiago basin's persistent temperature inversions. The enclosed Central Valley's near-complete Andean and Coastal Range topographic trapping compounds emissions extensively, while San Bernardo shares the broader Santiago metropolitan air quality challenges throughout most of the year.
Today - 9 August | Pollution peaks at 23:00
AQI:
Good
18.2/100
PM2.5 (fine particles):
Good
9.1/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
18.2/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.2/100
PM1 (ultrafine particles):
Good
1.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 04:00
AQI:
Good
18.5/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
5.9/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
18.5/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.3/100
PM1 (ultrafine particles):
Good
1.5/100
Frequently Asked Questions
Is air quality bad in San Bernardo right now?
On 9 August 2026, overall air quality in San Bernardo is good. AQI is the main air quality indicator at 18.2/100. Pollution peaks around 11:00 PM (O3: 18.2/100).
Will air quality be worse tomorrow in San Bernardo?
On 10 August 2026, air quality conditions in San Bernardo will be similar to today, with AQI forecast at good at 18.5/100. Pollution peaks around 4:00 AM (O3: 18.5/100).
When is air pollution at its worst in San Bernardo?
The biggest local contributor to pollution in San Bernardo is traffic emissions, particularly once temperature inversions set in over the valley. The surrounding valley terrain holds pollutants near the surface rather than letting them disperse. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher.
Are air quality levels in San Bernardo 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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