City report · Denmark
Aalborg Air quality today
Air quality in Aalborg currently reads AQI 31 (Good): Air quality is satisfactory for everyone.
AQI 31
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 5.4
- tree cover
- 23.8%
- trees in this area
- 63.5K
- more trees needed
- 16.5K
Measured across a 2 km radius around The Theatre District, 9000 Aalborg, Denmark (12.57 km²), from a satellite image of Aug 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Aalborg · AQI 31 (Good)
Aalborg's tree count comes to 63,480 trees across 10.67 km² of land, 6 points below the 30% tree-cover level considered healthy for this area, so roughly 16,537 more trees would close the gap.
Air quality detail
Air quality in Aalborg today: AQI 31, Good
Main pollutant: Ozone · Observed Nov 11, 17:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 9210 Aalborg SØ, 3.8 km away · median of 3 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.4
PM10
—
NO₂
5.0
O₃
66.3
SO₂
0.3
CO
—
Data: OpenAQ · AirGradient, EEA, Radu
- 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 Aalborg's daily AQI at 55 on average, from 36 on Nov 6 to an hourly peak of 90 on Nov 9.
Where Aalborg stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Aalborg: Below target
23.8% tree cover against a 30% healthy-neighborhood target, across 10.67 km² of land.
Trees in this area
63,480
Target trees
80,017
More trees needed
16,537
CO₂ if planted / yr
363.8 t
Deforestation · 2001–2025
How much forest has Aalborg lost?
Since 2001, the area within 10 km of Aalborg has lost about 274 hectares of forest (about 380 football pitches): 12% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 21 hectares (7.5%) 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
- 274 haabout 380 football pitches
- Share of its forest
- 12%of what there was in 2000
- Cleared for good
- 21 hadeforestation: turned into farms, mines or towns
The worst year was 2005, when about 107 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 | 1 ha | 9 ha | 11 ha |
| 2002 | under 1 ha | 2 ha | 2 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | 5 ha | 5 ha |
| 2005 | 3 ha | 104 ha | 107 ha |
| 2006 | 1 ha | 29 ha | 30 ha |
| 2007 | under 1 ha | 6 ha | 7 ha |
| 2008 | under 1 ha | 7 ha | 8 ha |
| 2009 | under 1 ha | 17 ha | 18 ha |
| 2010 | 1 ha | under 1 ha | 2 ha |
| 2011 | under 1 ha | 8 ha | 8 ha |
| 2012 | under 1 ha | 4 ha | 4 ha |
| 2013 | 3 ha | 5 ha | 7 ha |
| 2014 | under 1 ha | 7 ha | 7 ha |
| 2015 | under 1 ha | 5 ha | 5 ha |
| 2016 | under 1 ha | 8 ha | 8 ha |
| 2017 | under 1 ha | 7 ha | 8 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | 2 ha | 4 ha | 5 ha |
| 2020 | 1 ha | 3 ha | 4 ha |
| 2021 | 3 ha | 8 ha | 11 ha |
| 2022 | under 1 ha | 6 ha | 6 ha |
| 2023 | under 1 ha | 1 ha | 2 ha |
| 2024 | under 1 ha | 5 ha | 5 ha |
| 2025 | under 1 ha | 3 ha | 3 ha |
What is causing deforestation around Aalborg?
- Loggingcan grow back90% · 246 ha
- Towns and roadscleared for good6% · 17 ha
- Farms, pasture and plantationscleared for good1.3% · 4 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
- 1,560 ha
- Forest in 2020
- 1,980 ha
- Overall change
- +427 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Aalborg grew from about 1,560 hectares to 1,980 hectares, a net gain of about 427 hectares (+27%). New forest grew on about 613 hectares, while 186 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 Aalborg
Same 2 km radius, same index — so they compare directly.
- Gothenburg143.0 km
Sweden
- Tree cover
- 18%
- Air quality
- 35
- Kristiansand167.5 km
Norway
- Tree cover
- 42%
- Air quality
- 62
- Odense186.0 km
Denmark
- Tree cover
- 32%
- Air quality
- 78
- Esbjerg197.4 km
Denmark
- Tree cover
- 23%
- Air quality
- 23
- Helsingborg203.3 km
Sweden
- Tree cover
- 27%
- Air quality
- 48
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Frequently asked
Questions about Aalborg
What is the air quality (AQI) in Aalborg right now?
The latest reading for Aalborg shows an AQI of 31 (Good), measured Nov 11, 17:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 9210 Aalborg SØ, 3.8 km away). The main pollutant is Ozone. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Aalborg today?
At AQI 31 (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 Aalborg been like this week?
Over the last 7 days, the CAMS air-quality model put Aalborg's daily AQI at 55 on average, from 36 on Nov 6 to an hourly peak of 90 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 Aalborg lost since 2001?
Since 2001, the area within 10 km of Aalborg has lost about 274 hectares of forest (about 380 football pitches): 12% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 21 hectares (7.5%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Aalborg grew from about 1,560 hectares to 1,980 hectares, a net gain of about 427 hectares (+27%). New forest grew on about 613 hectares, while 186 hectares were lost.
What is the tree count in Aalborg?
Aalborg has an estimated 63,480 trees across the 10.67 km² of land measured — 23.8% tree cover, 6 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Aalborg need?
Aalborg needs roughly 16,537 more trees to close a 6-point shortfall against its 30% tree-cover target — about 363.8 t of extra CO₂ absorbed per year once grown.
How are Aalborg's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near The Theatre District, 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 The Theatre District; the tree count is an estimate derived from that cover.
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