Chalco Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (14 October): Air quality in Chalco is poor. AQI and PM10 are poor; PM2.5 is moderate; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (PM10: 97.3/100).
Air Quality Tomorrow
Tomorrow (15 October 2026): Air quality in Chalco is moderate. AQI improves to moderate; PM10 decreases to moderate; all other pollutants stay as today. Pollution peaks around 12:00 AM (PM10: 72.7/100).
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Air Quality
Today - 14 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Poor | 69.3/100 |
| PM2.5 (fine particles) | Moderate | 47.4/100 |
| PM10 (coarse particles) | Poor | 69.3/100 |
| NO2 (nitrogen dioxide) | Good | 0.3/100 |
| O3 (ozone) | Good | 7.6/100 |
| SO2 (sulfur dioxide) | Good | 0.1/100 |
| CO (carbon monoxide) | Good | 0.4/100 |
| HCHO (formaldehyde) | Good | 0.6/100 |
| PM1 (ultrafine particles) | Good | 13.0/100 |
Tomorrow - 15 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Moderate | 48.0/100 |
| PM2.5 (fine particles) | Moderate | 41.7/100 |
| PM10 (coarse particles) | Moderate | 48.0/100 |
| NO2 (nitrogen dioxide) | Good | 0.5/100 |
| O3 (ozone) | Good | 11.4/100 |
| SO2 (sulfur dioxide) | Good | 0.2/100 |
| CO (carbon monoxide) | Good | 0.4/100 |
| HCHO (formaldehyde) | Good | 0.9/100 |
| PM1 (ultrafine particles) | Good | 15.6/100 |
Local Environmental Conditions
With buildings covering much of the area around the heart of Chalco, traffic and other urban emissions are the biggest local influence on air quality. Its setting in the PM2.5. The Valley at around 2,230 m means cold air and pollution can get trapped close to the ground during calm spells. Industry adds to local emissions. Air arriving from elsewhere in the region adds to what is produced locally.
From November to January, cooler, still nights at around 11°C allow pollution to collect in the valley. Later in the year, ozone rises a little on sunny days from April to June, but the mild summers, around 18°C, keep it in check. On any given day, wind and rain matter most: breezy or wet weather disperses pollution, while calm, dry spells let it build.
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Frequently Asked Questions About Air Quality in México
Is air quality bad in Chalco right now?
On 14 October 2026, overall air quality in Chalco is poor. AQI is the main air quality indicator at 69.3/100. Pollution peaks around 9:00 AM (PM10: 97.3/100).
Will air quality be worse tomorrow in Chalco?
On 15 October 2026, air quality conditions in Chalco will be better than today, with AQI forecast at moderate at 48.0/100. Pollution peaks around 12:00 AM (PM10: 72.7/100).
When is air pollution at its worst in Chalco?
From November to January, cooler, still nights at around 11°C allow pollution to collect in the valley. Later in the year, ozone rises a little on sunny days from April to June, but the mild summers, around 18°C, keep it in check. On any given day, wind and rain matter most: breezy or wet weather disperses pollution, while calm, dry spells let it build.
Are air quality levels in Chalco 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.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |