Worst air pollution St. Moritz, today and tomorrow
Today (16 July): Air quality in St. Moritz is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 PM (O3: 40.8/100).
Tomorrow (17 July 2026): Air quality in St. Moritz is fair. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 41.0/100). 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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St. Moritz' air quality benefits from its high Engadin valley position above 1,800 metres, with winter luxury tourism traffic the primary seasonal source amid otherwise exceptionally clean mountain air.
Today - 16 July | Pollution peaks at 19:00
AQI:
Medium
40.8/100
PM2.5 (fine particles):
Good
9.2/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Fair
31.5/100
O3 (ozone):
Medium
40.8/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.2/100
PM1 (ultrafine particles):
Good
11.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 09:00
AQI:
Medium
41.0/100
PM2.5 (fine particles):
Good
14.7/100
PM10 (coarse particles):
Good
10.2/100
NO2 (nitrogen dioxide):
Fair
23.2/100
O3 (ozone):
Medium
41.0/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.8/100
PM1 (ultrafine particles):
Good
17.9/100
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Frequently Asked Questions
Is air quality bad in St. Moritz right now?
On 16 July 2026, overall air quality in St. Moritz is fair. NO2 is the main pollutant at 31.5/100. Pollution peaks around 7:00 PM (O3: 40.8/100).
Will air quality be worse tomorrow in St. Moritz?
On 17 July 2026, air quality conditions in St. Moritz will be similar to today, with NO2 forecast at fair at 23.2/100. Pollution peaks around 9:00 AM (O3: 41.0/100).
When is air pollution at its worst in St. Moritz?
St. Moritz's remote valley position means poor air quality is rare, with only a brief peak-season dip driven by winter tourism and seasonal traffic. The rest of the year, limited development and steady mountain airflow keep conditions reliably excellent.
Are air quality levels in St. Moritz 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