City report · Gelderland, The Netherlands
Arnhem Air quality today
Air quality in Arnhem currently reads AQI 75 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 75
Moderate
- PM2.5, fine particles (µg/m³)
- 21.8
- tree cover
- 31.4%
- trees in this area
- 93.3K
- more trees needed
- 0
Measured across a 2 km radius around Markt, Arnhem, Netherlands (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Arnhem · AQI 75 (Moderate)
Arnhem's tree count comes to 93,319 trees across 11.89 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Arnhem today: AQI 75, 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 · Nijmegen-Graafseweg, 15.8 km away · median of 6 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
21.8
PM10
28.9
NO₂
16.5
O₃
25.3
SO₂
—
CO
—
Data: OpenAQ · EEA, Netherlands, RIVM · Luchtmeetnet
- 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 Arnhem's daily AQI at 73 on average, from 49 on Nov 5 to an hourly peak of 99 on Nov 7.
Where Arnhem stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Arnhem: Healthy tree cover
31.4% tree cover against a 30% healthy-neighborhood target, across 11.89 km² of land.
Trees in this area
93,319
Target trees
93,319
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Arnhem lost?
Since 2001, the area within 10 km of Arnhem has lost about 697 hectares of forest (about 980 football pitches): 6.6% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 206 hectares (30%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km northwest of the city center.
- Forest lost since 2001
- 697 haabout 980 football pitches
- Share of its forest
- 6.6%of what there was in 2000
- Cleared for good
- 206 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 89 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 | 7 ha | 10 ha | 17 ha |
| 2002 | 4 ha | 12 ha | 16 ha |
| 2003 | 2 ha | under 1 ha | 3 ha |
| 2004 | 23 ha | 49 ha | 72 ha |
| 2005 | 24 ha | 28 ha | 52 ha |
| 2006 | 5 ha | 28 ha | 33 ha |
| 2007 | 12 ha | 31 ha | 43 ha |
| 2008 | 24 ha | 18 ha | 42 ha |
| 2009 | 17 ha | 26 ha | 43 ha |
| 2010 | 43 ha | 47 ha | 89 ha |
| 2011 | 3 ha | 16 ha | 19 ha |
| 2012 | 2 ha | 18 ha | 20 ha |
| 2013 | 2 ha | 3 ha | 5 ha |
| 2014 | under 1 ha | 4 ha | 5 ha |
| 2015 | under 1 ha | 2 ha | 2 ha |
| 2016 | 4 ha | 22 ha | 26 ha |
| 2017 | 1 ha | 30 ha | 31 ha |
| 2018 | 5 ha | 23 ha | 28 ha |
| 2019 | 7 ha | 48 ha | 55 ha |
| 2020 | 2 ha | 17 ha | 18 ha |
| 2021 | 5 ha | 31 ha | 35 ha |
| 2022 | 3 ha | 8 ha | 10 ha |
| 2023 | 5 ha | 19 ha | 25 ha |
| 2024 | 3 ha | 2 ha | 5 ha |
| 2025 | 4 ha | 1 ha | 5 ha |
What is causing deforestation around Arnhem?
- Loggingcan grow back67% · 470 ha
- Farms, pasture and plantationscleared for good18% · 128 ha
- Towns and roadscleared for good6.3% · 44 ha
Also: mining and energy, storms, floods and other natural causes, 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
- 11,500 ha
- Forest in 2020
- 11,800 ha
- Overall change
- +258 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Arnhem grew from about 11,500 hectares to 11,800 hectares, a net gain of about 258 hectares (+2.2%). New forest grew on about 854 hectares, while 595 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 Arnhem
Same 2 km radius, same index — so they compare directly.
- Nijmegen15.8 km
The Netherlands
- Tree cover
- 31%
- Air quality
- 74
- Amersfoort40.7 km
The Netherlands
- Tree cover
- 36%
- Air quality
- 119
- 's-Hertogenbosch52.1 km
The Netherlands
- Tree cover
- 30%
- Air quality
- 105
- Utrecht55.4 km
The Netherlands
- Tree cover
- 27%
- Air quality
- 73
- Zwolle60.5 km
The Netherlands
- Tree cover
- 31%
- Air quality
- 105
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Frequently asked
Questions about Arnhem
What is the air quality (AQI) in Arnhem right now?
The latest reading for Arnhem shows an AQI of 75 (Moderate), measured Nov 11, 16:00 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Nijmegen-Graafseweg, 15.8 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Arnhem today?
At AQI 75 (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 Arnhem been like this week?
Over the last 7 days, the CAMS air-quality model put Arnhem's daily AQI at 73 on average, from 49 on Nov 5 to an hourly peak of 99 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Arnhem lost since 2001?
Since 2001, the area within 10 km of Arnhem has lost about 697 hectares of forest (about 980 football pitches): 6.6% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 206 hectares (30%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Arnhem grew from about 11,500 hectares to 11,800 hectares, a net gain of about 258 hectares (+2.2%). New forest grew on about 854 hectares, while 595 hectares were lost.
What is the tree count in Arnhem?
Arnhem has an estimated 93,319 trees across the 11.89 km² of land measured — 31.4% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Arnhem need?
Arnhem has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Arnhem's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Markt, 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 Markt; the tree count is an estimate derived from that cover.
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