Worst air pollution Le Mans, today and tomorrow
Today (9 August): Air quality in Le Mans is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 34.0/100).
Tomorrow (10 August 2026): Air quality in Le Mans is fair. NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 7:00 PM (O3: 25.2/100). 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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Le Mans' air quality reflects its position in the Sarthe valley in the Maine region, with vehicle traffic on the A11 and the concentrated motorsport industry around the Circuit de la Sarthe — generating significant racing event vehicle emissions — alongside the surrounding automotive and parts manufacturing industry. Atlantic westerlies from the Loire Valley generally provide reasonable ventilation, while the flat Sarthe plain allows good dispersal on most days and the automotive character makes vehicular NOₓ the dominant year-round emission source.
Today - 9 August | Pollution peaks at 14:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
11.1/100
NO2 (nitrogen dioxide):
Fair
30.0/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
5.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.9/100
PM1 (ultrafine particles):
Good
9.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 19:00
AQI:
Fair
25.2/100
PM2.5 (fine particles):
Good
7.3/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
13.8/100
O3 (ozone):
Fair
25.2/100
SO2 (sulfur dioxide):
Good
3.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
5.4/100
Pollen forecast in Le Mans
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Frequently Asked Questions
Is air quality bad in Le Mans right now?
On 9 August 2026, overall air quality in Le Mans is fair. AQI is the main air quality indicator at 34.0/100. Pollution peaks around 2:00 PM (O3: 34.0/100).
Will air quality be worse tomorrow in Le Mans?
On 10 August 2026, air quality conditions in Le Mans will be similar to today, with AQI forecast at fair at 25.2/100. Pollution peaks around 7:00 PM (O3: 25.2/100).
When is air pollution at its worst in Le Mans?
In Le Mans, allergy sufferers and those sensitive to pollution both notice more symptoms when river-port traffic and light industry coincides with heavy oak and plane pollen; the Loire estuary and Atlantic winds ventilate the area, keeping bad spells relatively short. Nearby Loire valley and Vendee farmland add a further seasonal factor.
Are air quality levels in Le Mans 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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