City report · Bremen, Germany
Bremen Air quality today
Air quality in Bremen currently reads AQI 63 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 63
Moderate
- PM2.5, fine particles (µg/m³)
- 15.4
- tree cover
- 34.9%
- trees in this area
- 105K
- more trees needed
- 0
Measured across a 2 km radius around Altstadt, Mitte, Bremen, Germany (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Bremen · AQI 63 (Moderate)
Bremen's tree count comes to 104,708 trees across 12 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Bremen today: AQI 63, 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 · Bremen-Oslebshausen, 7.9 km away · median of 6 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
15.4
PM10
29.3
NO₂
27.5
O₃
35.2
SO₂
0.6
CO
300.0
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 Bremen's daily AQI at 61 on average, from 29 on Nov 4 to an hourly peak of 90 on Nov 10.
Where Bremen stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Bremen: Healthy tree cover
34.9% tree cover against a 30% healthy-neighborhood target, across 12 km² of land.
Trees in this area
104,708
Target trees
104,708
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Bremen lost?
Since 2001, the area within 10 km of Bremen has lost about 21 hectares of forest (about 29 football pitches): under 1% of the forest it had in 2000. Most of it (53%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 21 haabout 29 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 11 hadeforestation: turned into farms, mines or towns
The worst year was 2006, when about 3 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 | under 1 ha | under 1 ha | under 1 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 | 1 ha | under 1 ha | 1 ha |
| 2006 | 1 ha | 2 ha | 3 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | 1 ha | 2 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | 1 ha | under 1 ha | 1 ha |
| 2019 | 1 ha | under 1 ha | 1 ha |
| 2020 | under 1 ha | under 1 ha | 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Bremen?
- Towns and roadscleared for good52% · 11 ha
- Loggingcan grow back6.2% · 1 ha
- Farms, pasture and plantationscleared for good1.4% · under 1 ha
Also: 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
- 2,010 ha
- Forest in 2020
- 2,220 ha
- Overall change
- +209 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Bremen grew from about 2,010 hectares to 2,220 hectares, a net gain of about 209 hectares (+10%). New forest grew on about 259 hectares, while 51 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
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Frequently asked
Questions about Bremen
What is the air quality (AQI) in Bremen right now?
The latest reading for Bremen shows an AQI of 63 (Moderate), measured Nov 11, 16:00 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Bremen-Oslebshausen, 7.9 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Bremen today?
At AQI 63 (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 Bremen been like this week?
Over the last 7 days, the CAMS air-quality model put Bremen's daily AQI at 61 on average, from 29 on Nov 4 to an hourly peak of 90 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Bremen lost since 2001?
Since 2001, the area within 10 km of Bremen has lost about 21 hectares of forest (about 29 football pitches): under 1% of the forest it had in 2000. Most of it (53%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Bremen grew from about 2,010 hectares to 2,220 hectares, a net gain of about 209 hectares (+10%). New forest grew on about 259 hectares, while 51 hectares were lost.
What is the tree count in Bremen?
Bremen has an estimated 104,708 trees across the 12 km² of land measured — 34.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Bremen need?
Bremen has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Bremen's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Altstadt, 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 Altstadt; the tree count is an estimate derived from that cover.
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