City report · Austria
Vienna Air quality today
Air quality in Vienna currently reads AQI 114 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Air quality right now
AQI 114
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 40.7
- tree cover
- 16.5%
- trees in this area
- 50.9K
- more trees needed
- 57.0K
Measured across a 2 km radius around Innere Stadt, 1010 Vienna, Austria (12.57 km²), from a satellite image of Sep 8, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Vienna · AQI 114 (Unhealthy for sensitive groups)
Vienna's tree count comes to 50,851 trees across 12.33 km² of land, 18 points below the 35% tree-cover level considered healthy for this area, so roughly 57,015 more trees would close the gap.
Air quality detail
Air quality in Vienna today: AQI 114, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Vienna - Sonnwendviertel, 3.5 km away · median of 22 stations
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
40.7
PM10
26.2
NO₂
24.7
O₃
23.4
SO₂
2.7
CO
261.9
Data: OpenAQ · AirGradient, EEA, dro, TRV, Alex, MoleNord, Da Bozz
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Vienna's daily AQI at 75 on average, from 60 on Nov 4 to an hourly peak of 106 on Nov 6.
Where Vienna stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Vienna: Critically low
16.5% tree cover against a 35% healthy-neighborhood target, across 12.33 km² of land.
Trees in this area
50,851
Target trees
107,866
More trees needed
57,015
CO₂ if planted / yr
1,254 t
Deforestation · 2001–2025
How much forest has Vienna lost?
Since 2001, the area within 10 km of Vienna has lost about 112 hectares of forest (about 160 football pitches): 2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 21 hectares (19%) was deforestation: forest cleared for good for farms, mines or towns.
2018: satellite photo from August 2018 of a 5 × 5 km area about 7 km northwest of the city center.
- Forest lost since 2001
- 112 haabout 160 football pitches
- Share of its forest
- 2%of what there was in 2000
- Cleared for good
- 21 hadeforestation: turned into farms, mines or towns
The worst year was 2019, when about 11 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | 4 ha | 4 ha |
| 2002 | under 1 ha | 2 ha | 3 ha |
| 2003 | under 1 ha | 2 ha | 3 ha |
| 2004 | under 1 ha | 5 ha | 5 ha |
| 2005 | 2 ha | 7 ha | 9 ha |
| 2006 | under 1 ha | 5 ha | 6 ha |
| 2007 | 1 ha | 3 ha | 4 ha |
| 2008 | 4 ha | 4 ha | 7 ha |
| 2009 | under 1 ha | 2 ha | 2 ha |
| 2010 | 3 ha | 2 ha | 5 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | 4 ha | 4 ha |
| 2013 | under 1 ha | 2 ha | 3 ha |
| 2014 | 2 ha | 3 ha | 4 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | 4 ha | 5 ha |
| 2017 | under 1 ha | 3 ha | 3 ha |
| 2018 | under 1 ha | 2 ha | 2 ha |
| 2019 | 1 ha | 10 ha | 11 ha |
| 2020 | under 1 ha | 4 ha | 5 ha |
| 2021 | under 1 ha | 4 ha | 5 ha |
| 2022 | under 1 ha | 3 ha | 3 ha |
| 2023 | under 1 ha | 4 ha | 4 ha |
| 2024 | under 1 ha | 7 ha | 7 ha |
| 2025 | under 1 ha | 6 ha | 6 ha |
What is causing deforestation around Vienna?
- Loggingcan grow back69% · 77 ha
- Towns and roadscleared for good19% · 21 ha
- Unknown causescause unknown12% · 14 ha
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 12,100 ha
- Forest in 2020
- 12,300 ha
- Overall change
- +232 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Vienna stayed about the same size, at about 12,300 hectares: new forest grew on about 290 hectares, and about 59 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Vienna
Same 2 km radius, same index — so they compare directly.
- Bratislava54.9 km
Slovakia
- Tree cover
- 41%
- Air quality
- 63
- Győr110.7 km
Hungary
- Tree cover
- 28%
- Air quality
- 114
- Brno111.1 km
Czechia
- Tree cover
- 25%
- Air quality
- 67
- Nitra127.2 km
Slovakia
- Tree cover
- 35%
- Air quality
- 53
Also compared:Vienna vs Salzburg
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Frequently asked
Questions about Vienna
What is the air quality (AQI) in Vienna right now?
The latest reading for Vienna shows an AQI of 114 (Unhealthy for sensitive groups), measured Nov 11, 17:00 local time by 22 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Vienna - Sonnwendviertel, 3.5 km away). The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Vienna today?
At AQI 114 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Vienna been like this week?
Over the last 7 days, the CAMS air-quality model put Vienna's daily AQI at 75 on average, from 60 on Nov 4 to an hourly peak of 106 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Vienna lost since 2001?
Since 2001, the area within 10 km of Vienna has lost about 112 hectares of forest (about 160 football pitches): 2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 21 hectares (19%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Vienna stayed about the same size, at about 12,300 hectares: new forest grew on about 290 hectares, and about 59 hectares were lost.
What is the tree count in Vienna?
Vienna has an estimated 50,851 trees across the 12.33 km² of land measured — 16.5% tree cover, 18 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Vienna need?
Vienna needs roughly 57,015 more trees to close a 18-point shortfall against its 35% tree-cover target — about 1,254 t of extra CO₂ absorbed per year once grown.
How are Vienna's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Innere Stadt, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Innere Stadt; the tree count is an estimate derived from that cover.
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