City report · Norway
Trondheim Air quality today
Air quality in Trondheim currently reads AQI 29 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 29
Good
- PM2.5, fine particles (µg/m³)
- 5.3
- tree cover
- 37.6%
- trees in this area
- 81.3K
- more trees needed
- 0
Measured across a 2 km radius around Trondheim, Norway (12.57 km²), from a satellite image of Sep 4, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Trondheim · AQI 29 (Good)
Trondheim's tree count comes to 81,269 trees across 8.65 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Trondheim today: AQI 29, Good
Main pollutant: PM2.5 · Observed Nov 11, 16:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Elgeseter, 1.5 km away · median of 2 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.3
PM10
18.7
NO₂
28.7
O₃
—
SO₂
—
CO
—
Data: OpenAQ · EEA
- 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 Trondheim's daily AQI at 18 on average, from 11 on Nov 10 to an hourly peak of 49 on Nov 6.
Where Trondheim stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Trondheim: Healthy tree cover
37.6% tree cover against a 30% healthy-neighborhood target, across 8.65 km² of land.
Trees in this area
81,269
Target trees
81,269
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Trondheim lost?
Since 2001, the area within 10 km of Trondheim has lost about 930 hectares of forest (about 1,300 football pitches): 7.9% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 193 hectares (21%) 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 east of the city center.
- Forest lost since 2001
- 930 haabout 1,300 football pitches
- Share of its forest
- 7.9%of what there was in 2000
- Cleared for good
- 193 hadeforestation: turned into farms, mines or towns
Forest loss is speeding up: about 58 hectares a year in 2021–2025, up from 42 hectares a year in 2016–2020. The worst year was 2023, when about 93 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 | 2 ha | 7 ha | 9 ha |
| 2002 | 9 ha | 50 ha | 59 ha |
| 2003 | 1 ha | 19 ha | 20 ha |
| 2004 | 3 ha | 13 ha | 15 ha |
| 2005 | 2 ha | 11 ha | 13 ha |
| 2006 | 8 ha | 39 ha | 47 ha |
| 2007 | 5 ha | 26 ha | 31 ha |
| 2008 | 2 ha | 12 ha | 15 ha |
| 2009 | 2 ha | 11 ha | 13 ha |
| 2010 | 7 ha | 30 ha | 38 ha |
| 2011 | 10 ha | 12 ha | 22 ha |
| 2012 | 17 ha | 36 ha | 53 ha |
| 2013 | 8 ha | 20 ha | 29 ha |
| 2014 | 7 ha | 52 ha | 60 ha |
| 2015 | 2 ha | 6 ha | 8 ha |
| 2016 | 18 ha | 22 ha | 40 ha |
| 2017 | 5 ha | 26 ha | 31 ha |
| 2018 | 16 ha | 47 ha | 63 ha |
| 2019 | 5 ha | 10 ha | 15 ha |
| 2020 | 18 ha | 45 ha | 63 ha |
| 2021 | 24 ha | 43 ha | 67 ha |
| 2022 | 3 ha | 35 ha | 38 ha |
| 2023 | 10 ha | 82 ha | 93 ha |
| 2024 | 6 ha | 48 ha | 54 ha |
| 2025 | 2 ha | 34 ha | 37 ha |
What is causing deforestation around Trondheim?
- Loggingcan grow back77% · 720 ha
- Towns and roadscleared for good19% · 178 ha
- Unknown causescause unknown1.8% · 17 ha
Also: mining and energy, 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
- 10,800 ha
- Forest in 2020
- 10,300 ha
- Overall change
- −509 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Trondheim shrank from about 10,800 hectares to 10,300 hectares, a net loss of about 509 hectares (−4.7%). New forest grew on about 215 hectares, but 724 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 Trondheim
Same 2 km radius, same index — so they compare directly.
- Drammen410.1 km
Norway
- Tree cover
- 48%
- Air quality
- 56
- Umeå488.7 km
Sweden
- Tree cover
- 41%
- Air quality
- 6
- Örebro528.2 km
Sweden
- Tree cover
- 31%
- Air quality
- 20
- Västerås534.7 km
Sweden
- Tree cover
- 37%
- Air quality
- 29
Also compared:Trondheim vs Stavanger
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Frequently asked
Questions about Trondheim
What is the air quality (AQI) in Trondheim right now?
The latest reading for Trondheim shows an AQI of 29 (Good), measured Nov 11, 16:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Elgeseter, 1.5 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Trondheim today?
At AQI 29 (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 Trondheim been like this week?
Over the last 7 days, the CAMS air-quality model put Trondheim's daily AQI at 18 on average, from 11 on Nov 10 to an hourly peak of 49 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 Trondheim lost since 2001?
Since 2001, the area within 10 km of Trondheim has lost about 930 hectares of forest (about 1,300 football pitches): 7.9% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 193 hectares (21%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is speeding up: about 58 hectares a year in 2021–2025, up from 42 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Trondheim shrank from about 10,800 hectares to 10,300 hectares, a net loss of about 509 hectares (−4.7%). New forest grew on about 215 hectares, but 724 hectares were lost.
What is the tree count in Trondheim?
Trondheim has an estimated 81,269 trees across the 8.65 km² of land measured — 37.6% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Trondheim need?
Trondheim has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Trondheim's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Trondheim, 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 Trondheim; the tree count is an estimate derived from that cover.
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