Worst air pollution St. Gotthard Pass - Altdorf, today and tomorrow
Today (16 July): Air quality in St. Gotthard Pass is fair. O3 is fair; AQI and NO2 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 42.9/100).
Tomorrow (17 July 2026): Air quality in St. Gotthard Pass is fair. All pollutants stay as today. Pollution peaks around 12:00 AM (NO2: 44.3/100). 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
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St. Gotthard Pass' air quality reflects its historic role as a major north-south Alpine transit route, with seasonal tourist traffic and the nearby tunnel's ventilation systems the primary local sources.
Today - 16 July | Pollution peaks at 23:00
AQI:
Medium
42.9/100
PM2.5 (fine particles):
Good
12.3/100
PM10 (coarse particles):
Good
6.2/100
NO2 (nitrogen dioxide):
Medium
42.9/100
O3 (ozone):
Fair
39.9/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.6/100
PM1 (ultrafine particles):
Good
10.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 00:00
AQI:
Medium
44.3/100
PM2.5 (fine particles):
Good
10.9/100
PM10 (coarse particles):
Good
10.2/100
NO2 (nitrogen dioxide):
Medium
44.3/100
O3 (ozone):
Fair
36.0/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
8.4/100
Other Landmarks in Altdorf
Sports venues in Altdorf
Frequently Asked Questions
Is air quality bad in St. Gotthard Pass right now?
On 16 July 2026, overall air quality in St. Gotthard Pass is fair. O3 is the main pollutant at 39.9/100. Pollution peaks around 11:00 PM (NO2: 42.9/100).
Will air quality be worse tomorrow in St. Gotthard Pass?
On 17 July 2026, air quality conditions in St. Gotthard Pass will be similar to today, with O3 forecast at fair at 36.0/100. Pollution peaks around 12:00 AM (NO2: 44.3/100).
When is air pollution at its worst in St. Gotthard Pass?
St. Gotthard Pass' exposed, high-elevation position keeps air quality excellent almost year-round, with only a short peak-season window when seasonal tourist and cable car traffic adds a small, temporary bump. Otherwise thin air and minimal development keep conditions consistently outstanding.
Are air quality levels in St. Gotthard Pass 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