Worst air pollution Uster, today and tomorrow
Today (16 July): Air quality in Uster 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: 40.4/100).
Tomorrow (17 July 2026): Air quality in Uster is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 AM (NO2: 34.8/100). 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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Uster's air quality benefits from its Greifensee lakeside position in the Zürich Mittelland, with commuter traffic toward Zürich the primary local source. The lake breeze provides periodic natural ventilation across the town.
Today - 16 July | Pollution peaks at 13:00
AQI:
Medium
40.4/100
PM2.5 (fine particles):
Good
13.8/100
PM10 (coarse particles):
Good
5.6/100
NO2 (nitrogen dioxide):
Fair
31.2/100
O3 (ozone):
Medium
40.4/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.3/100
PM1 (ultrafine particles):
Good
15.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 01:00
AQI:
Fair
34.8/100
PM2.5 (fine particles):
Good
15.4/100
PM10 (coarse particles):
Good
5.8/100
NO2 (nitrogen dioxide):
Fair
34.8/100
O3 (ozone):
Fair
33.2/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Good
18.0/100
Pollen forecast in Uster
View pollen forecastFrequently Asked Questions
Is air quality bad in Uster right now?
On 16 July 2026, overall air quality in Uster is fair. NO2 is the main pollutant at 31.2/100. Pollution peaks around 1:00 PM (O3: 40.4/100).
Will air quality be worse tomorrow in Uster?
On 17 July 2026, air quality conditions in Uster will be similar to today, with AQI forecast at fair at 34.8/100. Pollution peaks around 1:00 AM (NO2: 34.8/100).
When is air pollution at its worst in Uster?
Winter stillness is the main driver of poor air quality at Uster, letting vehicle traffic and dense urban activity build up in the lake basin until the wind eventually returns. Warmer months bring noticeably better airflow around the lake, with only the occasional summer ozone spike breaking an otherwise clean pattern through spring and autumn.
Are air quality levels in Uster 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