Worst air pollution Blois, today and tomorrow
Today (16 July): Air quality in Blois is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 60.9/100).
Tomorrow (17 July 2026): Air quality in Blois is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 6:00 PM (O3: 41.0/100). 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.
Blois's air quality is driven largely by agricultural traffic and river-valley industry, close to the Indre, though the wide Loire valley allows steady airflow, which usually keeps pollution from accumulating for long. Cold, still winter spells are the main risk for particulate build-up, while summer usually sees cleaner air except during occasional heatwave-driven ozone episodes.
Today - 16 July | Pollution peaks at 13:00
AQI:
Poor
60.9/100
PM2.5 (fine particles):
Good
10.7/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Good
5.2/100
O3 (ozone):
Poor
60.9/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
15.4/100
PM1 (ultrafine particles):
Good
12.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 18:00
AQI:
Medium
41.0/100
PM2.5 (fine particles):
Good
7.2/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Good
2.0/100
O3 (ozone):
Medium
41.0/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.3/100
PM1 (ultrafine particles):
Good
9.0/100
Pollen forecast in Blois
View pollen forecastFrequently Asked Questions
Is air quality bad in Blois right now?
On 16 July 2026, overall air quality in Blois is poor. AQI is the main air quality indicator at 60.9/100. Pollution peaks around 1:00 PM (O3: 60.9/100).
Will air quality be worse tomorrow in Blois?
On 17 July 2026, air quality conditions in Blois will be better than today, with AQI forecast at medium at 41.0/100. Pollution peaks around 6:00 PM (O3: 41.0/100).
When is air pollution at its worst in Blois?
In Blois, the worst combined pollen and air quality days tend to come when agricultural traffic and river-valley industry coincide with the peak oak and plane pollen season in spring; the wide Loire valley allows steady airflow, so conditions usually improve within a day or two.
Are air quality levels in Blois 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