City report · Norway
Oslo Air quality today
Air quality in Oslo currently reads AQI 51 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 51
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 9.2
- tree cover
- 28.7%
- trees in this area
- 71.6K
- more trees needed
- 3.2K
Measured across a 2 km radius around Sentrum, Oslo, Norway (12.57 km²), from a satellite image of Sep 16, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Oslo · AQI 51 (Moderate)
Oslo's tree count comes to 71,590 trees across 9.98 km² of land, 1 points below the 30% tree-cover level considered healthy for this area, so roughly 3,243 more trees would close the gap.
Air quality detail
Air quality in Oslo today: AQI 51, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 16:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Bygdøy Alle, 2.9 km away · median of 8 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
9.2
PM10
16.3
NO₂
30.6
O₃
—
SO₂
—
CO
—
Data: OpenAQ · EEA
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Oslo's daily AQI at 73 on average, from 53 on Nov 5 to an hourly peak of 108 on Nov 8.
Where Oslo stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Oslo: Below target
28.7% tree cover against a 30% healthy-neighborhood target, across 9.98 km² of land.
Trees in this area
71,590
Target trees
74,833
More trees needed
3,243
CO₂ if planted / yr
71.3 t
Deforestation · 2001–2025
How much forest has Oslo lost?
Since 2001, the area within 10 km of Oslo has lost about 672 hectares of forest (about 940 football pitches): 4.8% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 212 hectares (32%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 672 haabout 940 football pitches
- Share of its forest
- 4.8%of what there was in 2000
- Cleared for good
- 212 hadeforestation: turned into farms, mines or towns
The worst year was 2016, when about 63 hectares of forest were lost.
Oslo's full deforestation reportHectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 7 ha | 9 ha | 15 ha |
| 2002 | 5 ha | 6 ha | 11 ha |
| 2003 | 2 ha | 2 ha | 4 ha |
| 2004 | 17 ha | 26 ha | 43 ha |
| 2005 | 4 ha | 12 ha | 16 ha |
| 2006 | 20 ha | 11 ha | 31 ha |
| 2007 | 15 ha | 14 ha | 28 ha |
| 2008 | 18 ha | 18 ha | 36 ha |
| 2009 | 9 ha | 10 ha | 19 ha |
| 2010 | 7 ha | 16 ha | 22 ha |
| 2011 | 4 ha | 6 ha | 10 ha |
| 2012 | 9 ha | 11 ha | 20 ha |
| 2013 | 12 ha | 14 ha | 26 ha |
| 2014 | 4 ha | 13 ha | 17 ha |
| 2015 | 5 ha | 17 ha | 22 ha |
| 2016 | 16 ha | 47 ha | 63 ha |
| 2017 | 9 ha | 19 ha | 27 ha |
| 2018 | 4 ha | 29 ha | 33 ha |
| 2019 | 7 ha | 28 ha | 34 ha |
| 2020 | 5 ha | 32 ha | 36 ha |
| 2021 | 7 ha | 35 ha | 42 ha |
| 2022 | 7 ha | 38 ha | 45 ha |
| 2023 | 4 ha | 32 ha | 36 ha |
| 2024 | 6 ha | 10 ha | 16 ha |
| 2025 | 11 ha | 8 ha | 19 ha |
What is causing deforestation around Oslo?
- Loggingcan grow back66% · 445 ha
- Towns and roadscleared for good31% · 209 ha
- Unknown causescause unknown2.2% · 15 ha
Also: farms, pasture and plantations.
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
- 12,900 ha
- Forest in 2020
- 12,200 ha
- Overall change
- −670 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Oslo shrank from about 12,900 hectares to 12,200 hectares, a net loss of about 670 hectares (−5.2%). New forest grew on about 216 hectares, but 886 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 Oslo
Same 2 km radius, same index — so they compare directly.
- Kristiansand251.6 km
Norway
- Tree cover
- 42%
- Air quality
- 62
- Gothenburg255.1 km
Sweden
- Tree cover
- 18%
- Air quality
- 35
- Örebro260.8 km
Sweden
- Tree cover
- 31%
- Air quality
- 20
Also compared:Oslo vs Trondheim
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Frequently asked
Questions about Oslo
What is the air quality (AQI) in Oslo right now?
The latest reading for Oslo shows an AQI of 51 (Moderate), measured Nov 11, 16:00 local time by 8 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Bygdøy Alle, 2.9 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Oslo today?
At AQI 51 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Oslo been like this week?
Over the last 7 days, the CAMS air-quality model put Oslo's daily AQI at 73 on average, from 53 on Nov 5 to an hourly peak of 108 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Oslo lost since 2001?
Since 2001, the area within 10 km of Oslo has lost about 672 hectares of forest (about 940 football pitches): 4.8% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 212 hectares (32%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Oslo shrank from about 12,900 hectares to 12,200 hectares, a net loss of about 670 hectares (−5.2%). New forest grew on about 216 hectares, but 886 hectares were lost.
What is the tree count in Oslo?
Oslo has an estimated 71,590 trees across the 9.98 km² of land measured — 28.7% tree cover, 1 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Oslo need?
Oslo needs roughly 3,243 more trees to close a 1-point shortfall against its 30% tree-cover target — about 71.3 t of extra CO₂ absorbed per year once grown.
How are Oslo's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Sentrum, 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 Sentrum; the tree count is an estimate derived from that cover.
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