Worst air pollution Seen - Winterthur, today and tomorrow
Today (16 July): Air quality in Seen is fair. PM2.5, NO2, and PM1 are fair; AQI and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 47.4/100).
Tomorrow (17 July 2026): Air quality in Seen is fair. AQI worsens to fair; PM2.5 decreases to good; O3 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 36.1/100). 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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Seen's air quality benefits from its eastern Winterthur position bordering open farmland, with vehicle traffic on regional roads the primary local source amid generally good wind dispersal.
Today - 16 July | Pollution peaks at 14:00
AQI:
Medium
47.4/100
PM2.5 (fine particles):
Fair
22.2/100
PM10 (coarse particles):
Good
7.0/100
NO2 (nitrogen dioxide):
Fair
32.9/100
O3 (ozone):
Medium
47.4/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Fair
26.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Fair
36.1/100
PM2.5 (fine particles):
Good
13.5/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Fair
31.3/100
O3 (ozone):
Fair
36.1/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
17.2/100
Other Landmarks in Winterthur
Frequently Asked Questions
Is air quality bad in Seen right now?
On 16 July 2026, overall air quality in Seen is fair. NO2 is the main pollutant at 32.9/100. Pollution peaks around 2:00 PM (O3: 47.4/100).
Will air quality be worse tomorrow in Seen?
On 17 July 2026, air quality conditions in Seen will be similar to today, with AQI forecast at fair at 36.1/100. Pollution peaks around 3:00 PM (O3: 36.1/100).
When is air pollution at its worst in Seen?
Winter stillness is the main driver of poor air quality at Seen, letting vehicle traffic and dense urban activity build up in the lake basin until the wind eventually returns. 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 Seen 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