City report · Baden-Wurttemberg, Germany
Ulm Air quality today
Air quality in Ulm currently reads AQI 75 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 75
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 22.1
- tree cover
- 33.2%
- trees in this area
- 103K
- more trees needed
- 0
Measured across a 2 km radius around Ulm, Germany (12.57 km²), from a satellite image of Sep 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Ulm · AQI 75 (Moderate)
Ulm's tree count comes to 103,466 trees across 12.47 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Ulm 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 · outdoor, 23.8 km away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
22.1
PM10
22.4
NO₂
—
O₃
3.5
SO₂
—
CO
—
Data: OpenAQ · AirGradient, EEA, mpw
- 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 Ulm's daily AQI at 62 on average, from 37 on Nov 10 to an hourly peak of 81 on Nov 7.
Where Ulm stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Ulm: Healthy tree cover
33.2% tree cover against a 30% healthy-neighborhood target, across 12.47 km² of land.
Trees in this area
103,466
Target trees
103,466
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Ulm lost?
Since 2001, the area within 10 km of Ulm has lost about 410 hectares of forest (about 570 football pitches): 6.3% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 27 hectares (6.6%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from June 2017 of a 5 × 5 km area about 7 km south of the city center.
- Forest lost since 2001
- 410 haabout 570 football pitches
- Share of its forest
- 6.3%of what there was in 2000
- Cleared for good
- 27 hadeforestation: turned into farms, mines or towns
The worst year was 2025, when about 52 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 | 10 ha | 14 ha |
| 2002 | under 1 ha | 2 ha | 2 ha |
| 2003 | under 1 ha | 1 ha | 1 ha |
| 2004 | 1 ha | 7 ha | 8 ha |
| 2005 | under 1 ha | 7 ha | 8 ha |
| 2006 | 2 ha | 11 ha | 13 ha |
| 2007 | under 1 ha | 12 ha | 12 ha |
| 2008 | 3 ha | 8 ha | 11 ha |
| 2009 | under 1 ha | 6 ha | 7 ha |
| 2010 | 3 ha | 27 ha | 30 ha |
| 2011 | under 1 ha | 11 ha | 11 ha |
| 2012 | under 1 ha | 4 ha | 5 ha |
| 2013 | under 1 ha | 4 ha | 5 ha |
| 2014 | under 1 ha | 11 ha | 11 ha |
| 2015 | under 1 ha | 5 ha | 5 ha |
| 2016 | 2 ha | 20 ha | 22 ha |
| 2017 | 1 ha | 27 ha | 28 ha |
| 2018 | under 1 ha | 22 ha | 23 ha |
| 2019 | under 1 ha | 13 ha | 14 ha |
| 2020 | under 1 ha | 13 ha | 14 ha |
| 2021 | under 1 ha | 21 ha | 21 ha |
| 2022 | under 1 ha | 16 ha | 16 ha |
| 2023 | under 1 ha | 38 ha | 39 ha |
| 2024 | 2 ha | 37 ha | 40 ha |
| 2025 | 2 ha | 50 ha | 52 ha |
What is causing deforestation around Ulm?
- Loggingcan grow back88% · 362 ha
- Towns and roadscleared for good3.7% · 15 ha
- Farms, pasture and plantationscleared for good2.9% · 12 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
- 8,550 ha
- Forest in 2020
- 8,540 ha
- Overall change
- −9 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Ulm stayed about the same size, at about 8,540 hectares: new forest grew on about 122 hectares, and about 131 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 Ulm
Same 2 km radius, same index — so they compare directly.
- Reutlingen59.0 km
Germany
- Tree cover
- 38%
- Air quality
- 19
- Augsburg67.0 km
Germany
- Tree cover
- 31%
- Air quality
- 95
- Stuttgart73.6 km
Germany
- Tree cover
- 41%
- Air quality
- 81
- Heilbronn100.0 km
Germany
- Tree cover
- 33%
- Air quality
- 80
- Pforzheim109.3 km
Germany
- Tree cover
- 48%
- Air quality
- 60
- Ingolstadt113.0 km
Germany
- Tree cover
- 37%
- Air quality
- 59
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Frequently asked
Questions about Ulm
What is the air quality (AQI) in Ulm right now?
The latest reading for Ulm shows an AQI of 75 (Moderate), measured Nov 11, 16:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is outdoor, 23.8 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Ulm 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 Ulm been like this week?
Over the last 7 days, the CAMS air-quality model put Ulm's daily AQI at 62 on average, from 37 on Nov 10 to an hourly peak of 81 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 Ulm lost since 2001?
Since 2001, the area within 10 km of Ulm has lost about 410 hectares of forest (about 570 football pitches): 6.3% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 27 hectares (6.6%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Ulm stayed about the same size, at about 8,540 hectares: new forest grew on about 122 hectares, and about 131 hectares were lost.
What is the tree count in Ulm?
Ulm has an estimated 103,466 trees across the 12.47 km² of land measured — 33.2% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Ulm need?
Ulm has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Ulm's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Ulm, 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 Ulm; the tree count is an estimate derived from that cover.
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