Worst air pollution Engadin Skimarathon Start (Silvaplana) - St. Moritz, today and tomorrow
Today (16 July): Air quality in Engadin Skimarathon Start (Silvaplana) is medium. AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 AM (NO2: 48.8/100).
Tomorrow (17 July 2026): Air quality in Engadin Skimarathon Start (Silvaplana) is fair. PM2.5 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 AM (NO2: 41.3/100). Airmine updates local air quality forecasts four times daily.
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Engadin Skimarathon Start's air quality benefits from its high Engadin lake-valley position, with the annual March cross-country ski marathon generating intense but brief concentrated participant and spectator traffic.
Today - 16 July | Pollution peaks at 03:00
AQI:
Medium
48.8/100
PM2.5 (fine particles):
Good
13.7/100
PM10 (coarse particles):
Good
4.7/100
NO2 (nitrogen dioxide):
Medium
48.8/100
O3 (ozone):
Medium
40.8/100
SO2 (sulfur dioxide):
Good
3.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.2/100
PM1 (ultrafine particles):
Good
17.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 06:00
AQI:
Medium
41.3/100
PM2.5 (fine particles):
Fair
21.7/100
PM10 (coarse particles):
Good
15.2/100
NO2 (nitrogen dioxide):
Medium
41.3/100
O3 (ozone):
Medium
41.0/100
SO2 (sulfur dioxide):
Good
5.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.8/100
PM1 (ultrafine particles):
Fair
24.8/100
Other Landmarks in St. Moritz
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Frequently Asked Questions
Is air quality bad in Engadin Skimarathon Start (Silvaplana) right now?
On 16 July 2026, overall air quality in Engadin Skimarathon Start (Silvaplana) is medium. AQI is the main air quality indicator at 48.8/100. Pollution peaks around 3:00 AM (NO2: 48.8/100).
Will air quality be worse tomorrow in Engadin Skimarathon Start (Silvaplana)?
On 17 July 2026, air quality conditions in Engadin Skimarathon Start (Silvaplana) will be worse than today, with PM1 forecast at fair at 24.8/100. Pollution peaks around 6:00 AM (NO2: 41.3/100).
When is air pollution at its worst in Engadin Skimarathon Start (Silvaplana)?
High above the valley floor, Engadin Skimarathon Start (Silvaplana) sees essentially no meaningful pollution outside of brief peak-season spikes tied to seasonal tourist and cable car traffic. The rest of the year, elevation and sparse development keep readings among the cleanest anywhere in the country.
Are air quality levels in Engadin Skimarathon Start (Silvaplana) 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.
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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