Worst air pollution St. Moritz Dorf - St. Moritz, today and tomorrow
Today (30 August): Air quality in St. Moritz Dorf is poor. AQI and NO2 are poor; PM2.5 and O3 are fair; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 AM (NO2: 68.0/100).
Tomorrow (31 August 2026): Air quality in St. Moritz Dorf is moderate. AQI improves to moderate; NO2 decreases to moderate; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 57.5/100). Airmine updates local air quality forecasts four times daily.
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St. Moritz Dorf's 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 - 30 August | Pollution peaks at 02:00
AQI:
Poor
68.0/100
PM2.5 (fine particles):
Fair
21.3/100
PM10 (coarse particles):
Good
15.6/100
NO2 (nitrogen dioxide):
Poor
68.0/100
O3 (ozone):
Fair
35.4/100
SO2 (sulfur dioxide):
Good
11.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.9/100
PM1 (ultrafine particles):
Good
17.7/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 23:00
AQI:
Moderate
57.5/100
PM2.5 (fine particles):
Fair
32.3/100
PM10 (coarse particles):
Good
18.0/100
NO2 (nitrogen dioxide):
Moderate
57.5/100
O3 (ozone):
Fair
39.3/100
SO2 (sulfur dioxide):
Good
10.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.7/100
PM1 (ultrafine particles):
Fair
27.4/100
Other Landmarks in St. Moritz
Sports venues in St. Moritz
Frequently Asked Questions
Is air quality bad in St. Moritz Dorf right now?
On 30 August 2026, overall air quality in St. Moritz Dorf is poor. AQI is the main air quality indicator at 68.0/100. Pollution peaks around 2:00 AM (NO2: 68.0/100).
Will air quality be worse tomorrow in St. Moritz Dorf?
On 31 August 2026, air quality conditions in St. Moritz Dorf will be better than today, with AQI forecast at moderate at 57.5/100. Pollution peaks around 11:00 PM (NO2: 57.5/100).
When is air pollution at its worst in St. Moritz Dorf?
St. Moritz Dorf'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 Dorf 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 30 August 2026 at 14:32 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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