Worst air pollution Bülach, today and tomorrow
Today (16 July): Air quality in Bülach is fair. PM2.5 and PM1 are fair; AQI, NO2, and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 3:00 AM (NO2: 51.4/100).
Tomorrow (17 July 2026): Air quality in Bülach is fair. PM2.5 decreases to good; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 2:00 AM (NO2: 49.4/100). 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
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Bülach's air quality benefits from its position in the flat Zürich Unterland north of the city, with vehicle traffic on regional roads the primary local source amid otherwise open farmland.
Today - 16 July | Pollution peaks at 03:00
AQI:
Medium
51.4/100
PM2.5 (fine particles):
Fair
25.9/100
PM10 (coarse particles):
Good
8.5/100
NO2 (nitrogen dioxide):
Medium
51.4/100
O3 (ozone):
Medium
48.0/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.1/100
PM1 (ultrafine particles):
Fair
30.4/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 02:00
AQI:
Medium
49.4/100
PM2.5 (fine particles):
Good
16.3/100
PM10 (coarse particles):
Good
6.6/100
NO2 (nitrogen dioxide):
Medium
49.4/100
O3 (ozone):
Fair
35.3/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Fair
20.1/100
Pollen forecast in Bülach
View pollen forecastFrequently Asked Questions
Is air quality bad in Bülach right now?
On 16 July 2026, overall air quality in Bülach is fair. PM1 is the main pollutant at 30.4/100. Pollution peaks around 3:00 AM (NO2: 51.4/100).
Will air quality be worse tomorrow in Bülach?
On 17 July 2026, air quality conditions in Bülach will be similar to today, with O3 forecast at fair at 35.3/100. Pollution peaks around 2:00 AM (NO2: 49.4/100).
When is air pollution at its worst in Bülach?
Winter stillness is the main driver of poor air quality at Bülach, letting vehicle traffic and dense urban activity build up in the lake basin until the wind eventually returns. Once spring arrives, dispersion improves steadily, and summer stays largely clear except during rare heatwaves; autumn tends to be another comparatively mild, steady stretch.
Are air quality levels in Bülach 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 Switzerland?
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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