Worst air pollution Kloten, today and tomorrow
Today (16 July): Air quality in Kloten is fair. PM2.5 and PM1 are fair; AQI, NO2, and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 48.0/100).
Tomorrow (17 July 2026): Air quality in Kloten is fair. PM2.5 decreases to good; O3 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 2:00 AM (NO2: 44.9/100). 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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Kloten's air quality reflects its position immediately adjacent to Zürich Airport, with aviation traffic generating elevated NOx and ultrafine particles alongside vehicle traffic on the A51 motorway throughout the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Medium
48.0/100
PM2.5 (fine particles):
Fair
24.3/100
PM10 (coarse particles):
Good
7.9/100
NO2 (nitrogen dioxide):
Medium
46.6/100
O3 (ozone):
Medium
48.0/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.1/100
PM1 (ultrafine particles):
Fair
28.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 02:00
AQI:
Medium
44.9/100
PM2.5 (fine particles):
Good
15.2/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Medium
44.9/100
O3 (ozone):
Fair
35.3/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
18.7/100
Pollen forecast in Kloten
View pollen forecastFrequently Asked Questions
Is air quality bad in Kloten right now?
On 16 July 2026, overall air quality in Kloten is fair. PM1 is the main pollutant at 28.7/100. Pollution peaks around 2:00 PM (O3: 48.0/100).
Will air quality be worse tomorrow in Kloten?
On 17 July 2026, air quality conditions in Kloten will be similar to today, with O3 forecast at fair at 35.3/100. Pollution peaks around 2:00 AM (NO2: 44.9/100).
When is air pollution at its worst in Kloten?
The worst stretch for air quality at Kloten tends to be a calm winter morning, when vehicle traffic and dense urban activity gather along the lakeshore under a layer of cold, trapped air. Summer usually brings much better dispersion, aside from the odd ozone spike during a hot, still afternoon, and spring and autumn tend to be the steadiest months overall.
Are air quality levels in Kloten 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