Worst air pollution Puente Alto, today and tomorrow
Today (16 July): Air quality in Puente Alto is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (PM2.5: 12.1/100).
Tomorrow (17 July 2026): Air quality in Puente Alto is good. All pollutants stay as today. Pollution peaks around 11:00 PM (O3: 16.9/100). 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
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Puente Alto's air quality reflects the Santiago metropolitan area's southeastern Maipo River valley corridor at 693 metres, with vehicle traffic on surrounding roads and the dense urban residential and services corridor 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 Puente Alto shares the broader Santiago metropolitan air quality challenges and generally maintains moderate to elevated Chilean capital basin readings throughout most of the year.
Today - 16 July | Pollution peaks at 23:00
AQI:
Good
12.1/100
PM2.5 (fine particles):
Good
12.1/100
PM10 (coarse particles):
Good
5.6/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Good
12.1/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
2.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 23:00
AQI:
Good
16.9/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Good
0.6/100
O3 (ozone):
Good
16.9/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.3/100
PM1 (ultrafine particles):
Good
2.4/100
Frequently Asked Questions
Is air quality bad in Puente Alto right now?
On 16 July 2026, overall air quality in Puente Alto is good. AQI is the main air quality indicator at 12.1/100. Pollution peaks around 11:00 PM (PM2.5: 12.1/100).
Will air quality be worse tomorrow in Puente Alto?
On 17 July 2026, air quality conditions in Puente Alto will be similar to today, with AQI forecast at good at 16.9/100. Pollution peaks around 11:00 PM (O3: 16.9/100).
When is air pollution at its worst in Puente Alto?
In Puente Alto, traffic on the surrounding roads is the main local source, with conditions worsening when temperature inversions set in over the valley. Topographic enclosure in the valley lets pollution accumulate rather than clear out. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Puente Alto 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