Worst air pollution Stade Geoffroy-Guichard - Saint-Étienne, today and tomorrow
Today (16 July): Air quality in Stade Geoffroy-Guichard is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 49.2/100).
Tomorrow (17 July 2026): Air quality in Stade Geoffroy-Guichard is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 36.4/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Stade Geoffroy-Guichard's air quality is shaped mainly by valley motorway traffic and light industry, while mountain valley winds alternate with calm temperature inversions, generally maintaining good conditions on most days. Winter is typically the worst season, as cold air settles in the valleys and traps traffic and heating emissions for days at a time; summer sees better dispersion but occasional ozone build-up in the lower valleys.
Today - 16 July | Pollution peaks at 13:00
AQI:
Medium
49.2/100
PM2.5 (fine particles):
Good
10.1/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Fair
23.5/100
O3 (ozone):
Medium
49.2/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.6/100
PM1 (ultrafine particles):
Good
10.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Fair
36.4/100
PM2.5 (fine particles):
Good
8.9/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Fair
22.9/100
O3 (ozone):
Fair
36.4/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.5/100
PM1 (ultrafine particles):
Good
9.1/100
Sports venues in Saint-Étienne
Frequently Asked Questions
Is air quality bad in Stade Geoffroy-Guichard right now?
On 16 July 2026, overall air quality in Stade Geoffroy-Guichard is fair. NO2 is the main pollutant at 23.5/100. Pollution peaks around 1:00 PM (O3: 49.2/100).
Will air quality be worse tomorrow in Stade Geoffroy-Guichard?
On 17 July 2026, air quality conditions in Stade Geoffroy-Guichard will be similar to today, with AQI forecast at fair at 36.4/100. Pollution peaks around 1:00 PM (O3: 36.4/100).
When is air pollution at its worst in Stade Geoffroy-Guichard?
Stade Geoffroy-Guichard is toughest for allergy sufferers when birch and oak pollen peaks and valley motorway traffic and light industry coincide; mountain valley winds alternate with calm temperature inversions, so it doesn't usually last. The presence of alpine valley pasture and orchards in the area adds another layer to the local pattern.
Are air quality levels in Stade Geoffroy-Guichard 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.
Want to see air quality forecasts for other cities in France?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app