Worst air pollution Stephansdom - Vienna, today and tomorrow
Today (16 July): Air quality in Stephansdom is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 63.7/100).
Tomorrow (17 July 2026): Air quality in Stephansdom is fair. AQI improves to medium; NO2 increases to fair; O3 decreases to medium; HCHO increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 57.1/100). 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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Stephansdom's air quality reflects Vienna's most pedestrianised square, with vehicle access restricted while surrounding tourist foot traffic and nearby streets still contribute background urban emissions to this central landmark.
Today - 16 July | Pollution peaks at 16:00
AQI:
Poor
63.7/100
PM2.5 (fine particles):
Good
12.2/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Good
18.6/100
O3 (ozone):
Poor
63.7/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
18.0/100
PM1 (ultrafine particles):
Good
15.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Medium
57.1/100
PM2.5 (fine particles):
Good
16.8/100
PM10 (coarse particles):
Good
5.2/100
NO2 (nitrogen dioxide):
Fair
26.1/100
O3 (ozone):
Medium
57.1/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.6/100
PM1 (ultrafine particles):
Fair
21.8/100
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Frequently Asked Questions
Is air quality bad in Stephansdom right now?
On 16 July 2026, overall air quality in Stephansdom is poor. AQI is the main air quality indicator at 63.7/100. Pollution peaks around 4:00 PM (O3: 63.7/100).
Will air quality be worse tomorrow in Stephansdom?
On 17 July 2026, air quality conditions in Stephansdom will be better than today, with NO2 forecast at fair at 26.1/100. Pollution peaks around 12:00 PM (O3: 57.1/100).
When is air pollution at its worst in Stephansdom?
Stephansdom's air quality is at its poorest on calm winter mornings, when vehicle traffic and residential heating across the city get trapped close to the ground by the Danube basin's inversion tendency. Warmer months bring stronger airflow and generally cleaner conditions, aside from the occasional ozone spike during a heatwave. Spring and autumn are usually the most reliable for clean air.
Are air quality levels in Stephansdom 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 Austria?
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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