Worst air pollution Rengo, today and tomorrow
Today (9 August): Air quality in Rengo is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 PM (O3: 18.0/100).
Tomorrow (10 August 2026): Air quality in Rengo is good. All pollutants stay as today. Pollution peaks around 6:00 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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Rengo's air quality reflects the Chilean O'Higgins Region's Cachapoal River valley position at 231 metres in the Central Valley, with vehicle traffic on surrounding roads and the wine, fruit, and agricultural corridor contributing local sources. The Central Valley's winter inversions compound vehicle and residential heating emissions, while Pacific westerlies provide seasonal relief and Rengo generally maintains moderate Chilean central valley agricultural readings throughout most of the year.
Today - 9 August | Pollution peaks at 20:00
AQI:
Good
18.0/100
PM2.5 (fine particles):
Good
9.5/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
18.0/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.2/100
PM1 (ultrafine particles):
Good
1.1/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 06:00
AQI:
Good
18.5/100
PM2.5 (fine particles):
Good
14.0/100
PM10 (coarse particles):
Good
6.3/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
18.5/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.3/100
PM1 (ultrafine particles):
Good
1.7/100
Frequently Asked Questions
Is air quality bad in Rengo right now?
On 9 August 2026, overall air quality in Rengo is good. AQI is the main air quality indicator at 18.0/100. Pollution peaks around 8:00 PM (O3: 18.0/100).
Will air quality be worse tomorrow in Rengo?
On 10 August 2026, air quality conditions in Rengo will be similar to today, with AQI forecast at good at 18.5/100. Pollution peaks around 6:00 AM (O3: 18.5/100).
When is air pollution at its worst in Rengo?
Air quality in Rengo tends to be worse when vehicle traffic as well as farming and agricultural processing build up and calm, stagnant conditions settle in the surrounding valley. The surrounding valley terrain holds pollutants near the surface rather than letting them disperse. Fuel burned for winter heating adds an extra layer of particulates on top of other sources.
Are air quality levels in Rengo 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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