Highest air pollution Santiago, today and tomorrow
Today (28 June): Air quality in Santiago is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (O3: 17.1/100).
Tomorrow (29 June 2026): Air quality in Santiago is good. All pollutants stay as today. Pollution peaks around 1:00 AM (O3: 17.2/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Santiago's air quality reflects the Central Valley's severe topographic trap at 567 metres, with the Andes to the east and the Coastal Range to the west creating near-complete basin enclosure that concentrates vehicle emissions from the Autopista Central and the extraordinary metropolitan vehicle density. The persistent anticyclonic inversion common to the Chilean Mediterranean climate makes Santiago one of South America's most challenging air quality environments, with winter inversion episodes creating some of the continent's most severe urban PM2.5 concentrations throughout the year.
Today - 28 June | Pollution peaks at 23:00
AQI:
Good
17.1/100
PM2.5 (fine particles):
Good
8.4/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
17.1/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.1/100
PM1 (ultrafine particles):
Good
0.8/100
Levels show the poorest local air quality during the day
Tomorrow - 29 June | Pollution peaks at 01:00
AQI:
Good
17.2/100
PM2.5 (fine particles):
Good
7.0/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
17.2/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.2/100
PM1 (ultrafine particles):
Good
0.8/100
Pollen forecast in Santiago
View pollen forecastFrequently Asked Questions
Is air quality bad in Santiago right now?
On 28 June 2026, overall air quality in Santiago is good. AQI is the main air quality indicator at 17.1/100. Pollution peaks around 11:00 PM (O3: 17.1/100).
Will air quality be worse tomorrow in Santiago?
On 29 June 2026, air quality conditions in Santiago will be similar to today, with AQI forecast at good at 17.2/100. Pollution peaks around 1:00 AM (O3: 17.2/100).
Are air quality levels in Santiago 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: 28 June 2026 at 18:37 CET (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
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team