Worst air pollution Aalst, today and tomorrow
Today (16 July): Air quality in Aalst is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 46.6/100).
Tomorrow (17 July 2026): Air quality in Aalst is fair. AQI worsens to fair; NO2 increases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 35.5/100). 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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Aalst's air quality reflects the Dender river valley in the East Flanders industrial corridor, with vehicle traffic on the A10 motorway and surrounding pharmaceutical, food processing, and textile manufacturing industry contributing elevated NOₓ and PM2.5. The flat Flemish plain provides reasonable dispersal on most days, while the broader Rhine-Meuse-Scheldt industrial background elevates regional PM2.5 and cross-border pollution from the Antwerp and Ghent port corridors influences background levels.
Today - 16 July | Pollution peaks at 17:00
AQI:
Medium
46.6/100
PM2.5 (fine particles):
Good
6.5/100
PM10 (coarse particles):
Good
2.1/100
NO2 (nitrogen dioxide):
Good
17.7/100
O3 (ozone):
Medium
46.6/100
SO2 (sulfur dioxide):
Good
3.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.4/100
PM1 (ultrafine particles):
Good
6.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
9.9/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Fair
25.5/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
4.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
7.6/100
Pollen forecast in Aalst
View pollen forecastFrequently Asked Questions
Is air quality bad in Aalst right now?
On 16 July 2026, overall air quality in Aalst is medium. AQI is the main air quality indicator at 46.6/100. Pollution peaks around 5:00 PM (O3: 46.6/100).
Will air quality be worse tomorrow in Aalst?
On 17 July 2026, air quality conditions in Aalst will be worse than today, with AQI forecast at fair at 35.5/100. Pollution peaks around 4:00 PM (O3: 35.5/100).
When is air pollution at its worst in Aalst?
You're quickest to notice worse air in Aalst when local combined tree and grass pollen peaks, or due to vehicle traffic on the A10 motorway and neighbouring pharmaceutical, food processing, and textile manufacturing industry; the remainder of the year typically brings clearer, more consistent conditions.
Are air quality levels in Aalst 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 Belgium?
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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