Worst air pollution Arosa, today and tomorrow
Today (16 July): Air quality in Arosa is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (O3: 39.1/100).
Tomorrow (17 July 2026): Air quality in Arosa is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 35.9/100). 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
Use our Strava plugin to check your own exposure.
Arosa's air quality benefits from its high-altitude Alpine valley position above Chur, with winter ski tourism traffic the primary seasonal local source amid generally excellent mountain background conditions.
Today - 16 July | Pollution peaks at 12:00
AQI:
Fair
39.1/100
PM2.5 (fine particles):
Good
8.2/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
19.6/100
O3 (ozone):
Fair
39.1/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.4/100
PM1 (ultrafine particles):
Good
10.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Fair
35.9/100
PM2.5 (fine particles):
Good
8.2/100
PM10 (coarse particles):
Good
5.8/100
NO2 (nitrogen dioxide):
Fair
21.0/100
O3 (ozone):
Fair
35.9/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
9.2/100
Pollen forecast in Arosa
View pollen forecastSports venues in Arosa
Frequently Asked Questions
Is air quality bad in Arosa right now?
On 16 July 2026, overall air quality in Arosa is fair. AQI is the main air quality indicator at 39.1/100. Pollution peaks around 12:00 PM (O3: 39.1/100).
Will air quality be worse tomorrow in Arosa?
On 17 July 2026, air quality conditions in Arosa will be similar to today, with AQI forecast at fair at 35.9/100. Pollution peaks around 3:00 PM (O3: 35.9/100).
When is air pollution at its worst in Arosa?
Arosa's air quality is almost always excellent, thanks to its remote, elevated valley position. The one modest exception is during peak season, when winter tourism and seasonal traffic adds a small, temporary bump in local emissions. Otherwise, mountain air keeps this site's readings consistently among the cleanest in the country.
Are air quality levels in Arosa 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?
Check air quality in other popular cities:
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