City report · Denmark
Århus Air quality today
Air quality in Århus currently reads AQI 36 (Good): Air quality is satisfactory for everyone.
AQI 36
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 6.4
- tree cover
- 20.0%
- trees in this area
- 48.6K
- more trees needed
- 24.3K
Measured across a 2 km radius around Latinerkvarteret, 8000 Aarhus, Denmark (12.57 km²), from a satellite image of Aug 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Århus · AQI 36 (Good)
Århus's tree count comes to 48,632 trees across 9.73 km² of land, 10 points below the 30% tree-cover level considered healthy for this area, so roughly 24,316 more trees would close the gap.
Air quality detail
Air quality in Århus today: AQI 36, Good
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Lighthouse Air Quality Station, 1.7 km away · median of 4 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.4
PM10
16.0
NO₂
9.5
O₃
54.1
SO₂
—
CO
—
Data: OpenAQ · AirGradient, EEA, Lighthouse AQ, Roflcopter
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Århus's daily AQI at 52 on average, from 23 on Nov 7 to an hourly peak of 85 on Nov 9.
Where Århus stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Århus: Below target
20.0% tree cover against a 30% healthy-neighborhood target, across 9.73 km² of land.
Trees in this area
48,632
Target trees
72,948
More trees needed
24,316
CO₂ if planted / yr
535.0 t
Deforestation · 2001–2025
How much forest has Århus lost?
Since 2001, the area within 10 km of Århus has lost about 54 hectares of forest (about 75 football pitches): 2.6% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 8 hectares (15%) was deforestation: forest cleared for good for farms, mines or towns.
2018: satellite photo from July 2018 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 54 haabout 75 football pitches
- Share of its forest
- 2.6%of what there was in 2000
- Cleared for good
- 8 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 | 2 ha | 3 ha |
| 2002 | under 1 ha | 2 ha | 2 ha |
| 2003 | under 1 ha | 1 ha | 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | 3 ha | 3 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | 3 ha | 3 ha |
| 2008 | under 1 ha | 3 ha | 3 ha |
| 2009 | under 1 ha | 5 ha | 6 ha |
| 2010 | under 1 ha | 2 ha | 2 ha |
| 2011 | under 1 ha | under 1 ha | 1 ha |
| 2012 | under 1 ha | 3 ha | 3 ha |
| 2013 | under 1 ha | 2 ha | 2 ha |
| 2014 | under 1 ha | 1 ha | 1 ha |
| 2015 | under 1 ha | 1 ha | 2 ha |
| 2016 | under 1 ha | 2 ha | 2 ha |
| 2017 | 1 ha | under 1 ha | 2 ha |
| 2018 | under 1 ha | 2 ha | 2 ha |
| 2019 | under 1 ha | 10 ha | 11 ha |
| 2020 | under 1 ha | under 1 ha | 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | 2 ha | 2 ha |
What is causing deforestation around Århus?
- Loggingcan grow back69% · 37 ha
- Towns and roadscleared for good13% · 7 ha
- Farms, pasture and plantationscleared for good2.1% · 1 ha
Also: unknown causes.
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
- 1,590 ha
- Forest in 2020
- 1,770 ha
- Overall change
- +185 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Århus grew from about 1,590 hectares to 1,770 hectares, a net gain of about 185 hectares (+12%). New forest grew on about 281 hectares, while 95 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 Århus
Same 2 km radius, same index — so they compare directly.
- Esbjerg133.8 km
Denmark
- Tree cover
- 23%
- Air quality
- 23
- Helsingborg154.5 km
Sweden
- Tree cover
- 27%
- Air quality
- 48
- Malmö184.5 km
Sweden
- Tree cover
- 15%
- Air quality
- 61
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Frequently asked
Questions about Århus
What is the air quality (AQI) in Århus right now?
The latest reading for Århus shows an AQI of 36 (Good), measured Nov 11, 17:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Lighthouse Air Quality Station, 1.7 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Århus today?
At AQI 36 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Århus been like this week?
Over the last 7 days, the CAMS air-quality model put Århus's daily AQI at 52 on average, from 23 on Nov 7 to an hourly peak of 85 on Nov 9. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Århus lost since 2001?
Since 2001, the area within 10 km of Århus has lost about 54 hectares of forest (about 75 football pitches): 2.6% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 8 hectares (15%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Århus grew from about 1,590 hectares to 1,770 hectares, a net gain of about 185 hectares (+12%). New forest grew on about 281 hectares, while 95 hectares were lost.
What is the tree count in Århus?
Århus has an estimated 48,632 trees across the 9.73 km² of land measured — 20.0% tree cover, 10 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Århus need?
Århus needs roughly 24,316 more trees to close a 10-point shortfall against its 30% tree-cover target — about 535.0 t of extra CO₂ absorbed per year once grown.
How are Århus's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Latinerkvarteret, 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 Latinerkvarteret; the tree count is an estimate derived from that cover.
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