Worst air pollution Altstadt Chur - Chur, today and tomorrow
Today (16 July): Air quality in Altstadt Chur is fair. O3 is fair; AQI and NO2 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 AM (NO2: 42.1/100).
Tomorrow (17 July 2026): Air quality in Altstadt Chur is fair. All pollutants stay as today. Pollution peaks around 1:00 AM (NO2: 43.6/100). 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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Altstadt Chur's air quality reflects the city's dense historic core, with pedestrian zones limiting traffic while the enclosed Rhine valley's surrounding peaks still trap emissions under calm conditions.
Today - 16 July | Pollution peaks at 04:00
AQI:
Medium
42.1/100
PM2.5 (fine particles):
Good
12.3/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Medium
42.1/100
O3 (ozone):
Fair
39.1/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.4/100
PM1 (ultrafine particles):
Good
15.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 01:00
AQI:
Medium
43.6/100
PM2.5 (fine particles):
Good
12.4/100
PM10 (coarse particles):
Good
8.7/100
NO2 (nitrogen dioxide):
Medium
43.6/100
O3 (ozone):
Fair
35.9/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
13.8/100
Other Landmarks in Chur
Frequently Asked Questions
Is air quality bad in Altstadt Chur right now?
On 16 July 2026, overall air quality in Altstadt Chur is fair. O3 is the main pollutant at 39.1/100. Pollution peaks around 4:00 AM (NO2: 42.1/100).
Will air quality be worse tomorrow in Altstadt Chur?
On 17 July 2026, air quality conditions in Altstadt Chur will be similar to today, with O3 forecast at fair at 35.9/100. Pollution peaks around 1:00 AM (NO2: 43.6/100).
When is air pollution at its worst in Altstadt Chur?
At Altstadt Chur, poor air quality is essentially a non-issue outside of the busiest tourist weeks, when winter tourism and seasonal traffic briefly nudges emissions upward in an otherwise pristine Alpine valley. The rest of the year, minimal population and constant mountain airflow keep conditions consistently excellent.
Are air quality levels in Altstadt Chur 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