Worst air pollution Lerma, today and tomorrow
Today (9 August): Air quality in Lerma is poor. AQI and PM10 are poor; O3 is fair; PM2.5 is medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (PM10: 74.6/100).
Tomorrow (10 August 2026): Air quality in Lerma is medium. AQI improves to medium; PM10 decreases to medium; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 9:00 PM (PM10: 53.6/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Lerma's air quality reflects the Estado de México Toluca Valley's eastern corridor at 2,611 metres adjacent to the Lerma River headwaters, with vehicle traffic on surrounding roads and the manufacturing, industrial, and residential corridor contributing elevated local emissions under the valley's persistent inversions. The Toluca Valley's topographic enclosure creates concentration under inversions, while the elevated altitude worsens ozone formation and Lerma generally maintains moderate to elevated Mexican highland industrial valley corridor readings throughout most of the year.
Today - 9 August | Pollution peaks at 18:00
AQI:
Poor
74.6/100
PM2.5 (fine particles):
Medium
55.0/100
PM10 (coarse particles):
Poor
74.6/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
20.5/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
11.4/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 21:00
AQI:
Medium
53.6/100
PM2.5 (fine particles):
Medium
45.5/100
PM10 (coarse particles):
Medium
53.6/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
18.8/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.3/100
PM1 (ultrafine particles):
Good
9.3/100
Frequently Asked Questions
Is air quality bad in Lerma right now?
On 9 August 2026, overall air quality in Lerma is poor. AQI is the main air quality indicator at 74.6/100. Pollution peaks around 6:00 PM (PM10: 74.6/100).
Will air quality be worse tomorrow in Lerma?
On 10 August 2026, air quality conditions in Lerma will be better than today, with AQI forecast at medium at 53.6/100. Pollution peaks around 9:00 PM (PM10: 53.6/100).
When is air pollution at its worst in Lerma?
In Lerma, traffic on the surrounding roads together with textile and manufacturing operations are the main local sources, with conditions worsening when calm, stagnant conditions settle in the surrounding valley. The bowl-like terrain here limits how quickly pollutants can escape. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher.
Are air quality levels in Lerma 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.
Check air quality in other popular cities:
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.
Get the full experience in the Airmine app.