Worst air pollution Chimalhuacán, today and tomorrow
Today (9 August): Air quality in Chimalhuacán is very poor. AQI and PM10 are very poor; PM2.5 is poor; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (PM10: 88.4/100).
Tomorrow (10 August 2026): Air quality in Chimalhuacán is poor. AQI improves to poor; PM2.5 decreases to medium; PM10 decreases to poor; all other pollutants stay as today. Pollution peaks around 10:00 PM (PM10: 67.1/100). 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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Chimalhuacán's air quality reflects Mexico City's eastern metropolitan corridor at 2,250 metres in the desiccated Texcoco Lake basin, with vehicle traffic on surrounding roads and the dense urban residential and light industrial corridor generating elevated PM2.5 from the infamous windblown toxic lake bed dust. The dried Texcoco Lake's saline and chemical dust represents one of Mexico City metropolitan area's most distinctive environmental justice air quality concerns, while the valley's persistent inversions compound the extraordinary lake bed dust episodes throughout the year.
Today - 9 August | Pollution peaks at 18:00
AQI:
Very poor
88.4/100
PM2.5 (fine particles):
Poor
62.8/100
PM10 (coarse particles):
Very poor
88.4/100
NO2 (nitrogen dioxide):
Good
0.4/100
O3 (ozone):
Good
20.0/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.5/100
PM1 (ultrafine particles):
Good
15.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 22:00
AQI:
Poor
67.1/100
PM2.5 (fine particles):
Medium
52.8/100
PM10 (coarse particles):
Poor
67.1/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Good
18.5/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.9/100
PM1 (ultrafine particles):
Good
13.0/100
Frequently Asked Questions
Is air quality bad in Chimalhuacán right now?
On 9 August 2026, overall air quality in Chimalhuacán is very poor. AQI is the main air quality indicator at 88.4/100. Pollution peaks around 6:00 PM (PM10: 88.4/100).
Will air quality be worse tomorrow in Chimalhuacán?
On 10 August 2026, air quality conditions in Chimalhuacán will be better than today, with AQI forecast at poor at 67.1/100. Pollution peaks around 10:00 PM (PM10: 67.1/100).
When is air pollution at its worst in Chimalhuacán?
In Chimalhuacán, road traffic along with heavy industrial and chemical processing are the main local sources, with conditions worsening when the surrounding valley traps air close to the ground. Topographic enclosure in the valley lets pollution accumulate rather than clear out. Dust carried on these winds adds substantially to particulate levels.
Are air quality levels in Chimalhuacán 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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