City report · Hesse, Germany
Kassel Air quality today
Air quality in Kassel currently reads AQI 58 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 58
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 12.9
- tree cover
- 40.9%
- trees in this area
- 127K
- more trees needed
- 0
Measured across a 2 km radius around Mitte, Kassel, Germany (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kassel · AQI 58 (Moderate)
Kassel's tree count comes to 127,078 trees across 12.43 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Kassel today: AQI 58, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Kassel Fünffensterstraße, 800 m away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
12.9
PM10
13.0
NO₂
23.3
O₃
—
SO₂
0.8
CO
753.4
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 Kassel's daily AQI at 63 on average, from 41 on Nov 4 to an hourly peak of 86 on Nov 8.
Where Kassel stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kassel: Healthy tree cover
40.9% tree cover against a 30% healthy-neighborhood target, across 12.43 km² of land.
Trees in this area
127,078
Target trees
127,078
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Kassel lost?
Since 2001, the area within 10 km of Kassel has lost about 1,030 hectares of forest (about 1,400 football pitches): 11% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 19 hectares (1.8%) 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 west of the city center.
- Forest lost since 2001
- 1,030 haabout 1,400 football pitches
- Share of its forest
- 11%of what there was in 2000
- Cleared for good
- 19 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 19 hectares a year in 2021–2025, down from 109 hectares a year in 2016–2020. The worst year was 2020, when about 232 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 | 4 ha | 18 ha | 22 ha |
| 2002 | under 1 ha | 1 ha | 1 ha |
| 2003 | under 1 ha | 1 ha | 1 ha |
| 2004 | 2 ha | 23 ha | 26 ha |
| 2005 | 3 ha | 22 ha | 24 ha |
| 2006 | 1 ha | 55 ha | 56 ha |
| 2007 | under 1 ha | 12 ha | 12 ha |
| 2008 | 1 ha | 90 ha | 92 ha |
| 2009 | 2 ha | 11 ha | 13 ha |
| 2010 | 2 ha | 123 ha | 125 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | 12 ha | 13 ha |
| 2013 | under 1 ha | 3 ha | 3 ha |
| 2014 | under 1 ha | 2 ha | 2 ha |
| 2015 | under 1 ha | 4 ha | 5 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | 6 ha | 6 ha |
| 2018 | under 1 ha | 88 ha | 89 ha |
| 2019 | under 1 ha | 217 ha | 217 ha |
| 2020 | under 1 ha | 232 ha | 232 ha |
| 2021 | under 1 ha | 50 ha | 50 ha |
| 2022 | under 1 ha | 24 ha | 24 ha |
| 2023 | under 1 ha | 15 ha | 15 ha |
| 2024 | under 1 ha | 1 ha | 2 ha |
| 2025 | under 1 ha | 4 ha | 4 ha |
What is causing deforestation around Kassel?
- Loggingcan grow back97% · 999 ha
- Towns and roadscleared for good1.8% · 19 ha
- Unknown causescause unknown1.5% · 16 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
- 14,300 ha
- Forest in 2020
- 14,300 ha
- Overall change
- +72 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kassel stayed about the same size, at about 14,300 hectares: new forest grew on about 445 hectares, and about 372 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 Kassel
Same 2 km radius, same index — so they compare directly.
- Göttingen38.5 km
Germany
- Tree cover
- 45%
- Air quality
- 44
- Paderborn68.3 km
Germany
- Tree cover
- 44%
- Air quality
- 76
- Hildesheim97.8 km
Germany
- Tree cover
- 37%
- Air quality
- 77
- Bielefeld103.9 km
Germany
- Tree cover
- 41%
- Air quality
- 123
- Salzgitter112.7 km
Germany
- Tree cover
- 23%
- Air quality
- 77
- Erfurt113.6 km
Germany
- Tree cover
- 34%
- Air quality
- 60
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Frequently asked
Questions about Kassel
What is the air quality (AQI) in Kassel right now?
The latest reading for Kassel shows an AQI of 58 (Moderate), measured Nov 11, 17:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Kassel Fünffensterstraße, 800 m away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Kassel today?
At AQI 58 (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 Kassel been like this week?
Over the last 7 days, the CAMS air-quality model put Kassel's daily AQI at 63 on average, from 41 on Nov 4 to an hourly peak of 86 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 Kassel lost since 2001?
Since 2001, the area within 10 km of Kassel has lost about 1,030 hectares of forest (about 1,400 football pitches): 11% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 19 hectares (1.8%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 19 hectares a year in 2021–2025, down from 109 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Kassel stayed about the same size, at about 14,300 hectares: new forest grew on about 445 hectares, and about 372 hectares were lost.
What is the tree count in Kassel?
Kassel has an estimated 127,078 trees across the 12.43 km² of land measured — 40.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Kassel need?
Kassel has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Kassel's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Mitte, 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 Mitte; the tree count is an estimate derived from that cover.
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