City report · Lower Saxony, Germany
Hannover Air quality today
Air quality in Hannover currently reads AQI 81 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 81
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 25.3
- tree cover
- 35.3%
- trees in this area
- 108K
- more trees needed
- 0
Measured across a 2 km radius around Mitte, Hanover-Mitte, Hanover, Germany (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hannover · AQI 81 (Moderate)
Hannover's tree count comes to 108,126 trees across 12.26 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Hannover today: AQI 81, 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 · Hannover, 2 km away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
25.3
PM10
31.1
NO₂
21.4
O₃
25.7
SO₂
—
CO
210.2
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 Hannover's daily AQI at 71 on average, from 49 on Nov 5 to an hourly peak of 89 on Nov 8.
Where Hannover stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hannover: Healthy tree cover
35.3% tree cover against a 30% healthy-neighborhood target, across 12.26 km² of land.
Trees in this area
108,126
Target trees
108,126
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Hannover lost?
Since 2001, the area within 10 km of Hannover has lost about 60 hectares of forest (about 85 football pitches): 1.1% of the forest it had in 2000. The biggest cause was logging (48%), after which forest can grow back. About 19 hectares (31%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 60 haabout 85 football pitches
- Share of its forest
- 1.1%of what there was in 2000
- Cleared for good
- 19 hadeforestation: turned into farms, mines or towns
The worst year was 2023, when about 7 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 | 2 ha | 3 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | 2 ha | 3 ha |
| 2006 | under 1 ha | 6 ha | 6 ha |
| 2007 | under 1 ha | 1 ha | 1 ha |
| 2008 | under 1 ha | 4 ha | 4 ha |
| 2009 | under 1 ha | under 1 ha | 1 ha |
| 2010 | under 1 ha | 4 ha | 4 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | 1 ha |
| 2018 | 2 ha | 3 ha | 6 ha |
| 2019 | 1 ha | 5 ha | 6 ha |
| 2020 | under 1 ha | 3 ha | 3 ha |
| 2021 | 2 ha | under 1 ha | 3 ha |
| 2022 | under 1 ha | 2 ha | 3 ha |
| 2023 | 3 ha | 4 ha | 7 ha |
| 2024 | 3 ha | 1 ha | 4 ha |
| 2025 | under 1 ha | under 1 ha | 1 ha |
What is causing deforestation around Hannover?
- Loggingcan grow back48% · 29 ha
- Towns and roadscleared for good30% · 18 ha
- Unknown causescause unknown22% · 13 ha
Also: farms, pasture and plantations, mining and energy.
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
- 4,400 ha
- Forest in 2020
- 4,700 ha
- Overall change
- +294 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hannover grew from about 4,400 hectares to 4,700 hectares, a net gain of about 294 hectares (+6.7%). New forest grew on about 351 hectares, while 57 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 Hannover
Same 2 km radius, same index — so they compare directly.
- Hildesheim28.6 km
Germany
- Tree cover
- 37%
- Air quality
- 79
- Salzgitter52.1 km
Germany
- Tree cover
- 23%
- Air quality
- 80
- Braunschweig55.2 km
Germany
- Tree cover
- 38%
- Air quality
- 80
- Wolfsburg71.0 km
Germany
- Tree cover
- 35%
- Air quality
- 79
- Bielefeld90.0 km
Germany
- Tree cover
- 41%
- Air quality
- 106
- Göttingen94.0 km
Germany
- Tree cover
- 45%
- Air quality
- 43
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Frequently asked
Questions about Hannover
What is the air quality (AQI) in Hannover right now?
The latest reading for Hannover shows an AQI of 81 (Moderate), measured Nov 11, 16:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Hannover, 2 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Hannover today?
At AQI 81 (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 Hannover been like this week?
Over the last 7 days, the CAMS air-quality model put Hannover's daily AQI at 71 on average, from 49 on Nov 5 to an hourly peak of 89 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 Hannover lost since 2001?
Since 2001, the area within 10 km of Hannover has lost about 60 hectares of forest (about 85 football pitches): 1.1% of the forest it had in 2000. The biggest cause was logging (48%), after which forest can grow back. About 19 hectares (31%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Hannover grew from about 4,400 hectares to 4,700 hectares, a net gain of about 294 hectares (+6.7%). New forest grew on about 351 hectares, while 57 hectares were lost.
What is the tree count in Hannover?
Hannover has an estimated 108,126 trees across the 12.26 km² of land measured — 35.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Hannover need?
Hannover has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Hannover'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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