Worst air pollution Innere Stadt - Vienna, today and tomorrow
Today (20 September): Air quality in Innere Stadt is moderate. AQI and NO2 are moderate; PM2.5, O3, and HCHO are fair; PM10, SO2, CO, and PM1 are good. Pollution peaks around 12:00 AM (NO2: 41.6/100).
Tomorrow (21 September 2026): Air quality in Innere Stadt is good. AQI improves to good; PM2.5 decreases to good; NO2 decreases to good; O3 decreases to good; HCHO decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 AM (O3: 15.7/100). Airmine updates local air quality forecasts four times daily.
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Innere Stadt's air quality reflects Vienna's densest historic core, with pedestrian zones limiting through-traffic while surrounding Ringstrasse traffic contributes background NOx. The compact street grid can trap emissions during calm summer conditions.
Today - 20 September | Pollution peaks at 00:00
AQI:
Moderate
41.6/100
PM2.5 (fine particles):
Fair
33.8/100
PM10 (coarse particles):
Good
16.8/100
NO2 (nitrogen dioxide):
Moderate
41.6/100
O3 (ozone):
Fair
21.5/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
1.0/100
HCHO (formaldehyde):
Fair
20.6/100
PM1 (ultrafine particles):
Good
15.1/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 00:00
AQI:
Good
15.7/100
PM2.5 (fine particles):
Good
13.6/100
PM10 (coarse particles):
Good
8.9/100
NO2 (nitrogen dioxide):
Good
12.0/100
O3 (ozone):
Good
15.7/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
2.9/100
PM1 (ultrafine particles):
Good
3.2/100
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Frequently Asked Questions
Is air quality bad in Innere Stadt right now?
On 20 September 2026, overall air quality in Innere Stadt is moderate. AQI is the main air quality indicator at 41.6/100. Pollution peaks around 12:00 AM (NO2: 41.6/100).
Will air quality be worse tomorrow in Innere Stadt?
On 21 September 2026, air quality conditions in Innere Stadt will be better than today, with AQI forecast at good at 15.7/100. Pollution peaks around 12:00 AM (O3: 15.7/100).
When is air pollution at its worst in Innere Stadt?
Winter is when Innere Stadt sees its worst air quality, as vehicle traffic and residential heating across the city settle under a basin inversion on calm, cold mornings. Things pick up through spring, and summer's stronger winds keep the air generally clear despite occasional hot-weather ozone peaks. Autumn tends to be another comparatively steady stretch across the city.
Are air quality levels in Innere Stadt 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: 20 September 2026 at 14:33 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.
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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