City report · Lower Saxony, Germany
Hildesheim Air quality today
Air quality in Hildesheim currently reads AQI 79 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 79
Moderate
- PM2.5, fine particles (µg/m³)
- 24.3
- tree cover
- 36.6%
- trees in this area
- 114K
- more trees needed
- 0
Measured across a 2 km radius around Hildesheim, Germany (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hildesheim · AQI 79 (Moderate)
Hildesheim's tree count comes to 114,177 trees across 12.48 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Hildesheim today: AQI 79, 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 · Hildesheim Verkehr, 100 m away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
24.3
PM10
—
NO₂
37.1
O₃
—
SO₂
—
CO
786.1
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 Hildesheim's daily AQI at 68 on average, from 48 on Nov 5 to an hourly peak of 86 on Nov 8.
Where Hildesheim stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hildesheim: Healthy tree cover
36.6% tree cover against a 30% healthy-neighborhood target, across 12.48 km² of land.
Trees in this area
114,177
Target trees
114,177
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Hildesheim lost?
Since 2001, the area within 10 km of Hildesheim has lost about 1,270 hectares of forest (about 1,800 football pitches): 17% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 2 hectares (under 1%) 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 southwest of the city center.
- Forest lost since 2001
- 1,270 haabout 1,800 football pitches
- Share of its forest
- 17%of what there was in 2000
- Cleared for good
- 2 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 70 hectares a year in 2021–2025, down from 141 hectares a year in 2016–2020. The worst year was 2020, when about 510 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 | 13 ha | 13 ha |
| 2002 | under 1 ha | 2 ha | 2 ha |
| 2003 | under 1 ha | 5 ha | 5 ha |
| 2004 | under 1 ha | 36 ha | 36 ha |
| 2005 | under 1 ha | 23 ha | 23 ha |
| 2006 | under 1 ha | 54 ha | 54 ha |
| 2007 | under 1 ha | 1 ha | 1 ha |
| 2008 | under 1 ha | 40 ha | 40 ha |
| 2009 | under 1 ha | 5 ha | 5 ha |
| 2010 | under 1 ha | 7 ha | 7 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | 16 ha | 16 ha |
| 2013 | under 1 ha | 6 ha | 6 ha |
| 2014 | under 1 ha | 2 ha | 2 ha |
| 2015 | under 1 ha | 2 ha | 2 ha |
| 2016 | under 1 ha | 3 ha | 3 ha |
| 2017 | under 1 ha | 9 ha | 9 ha |
| 2018 | under 1 ha | 67 ha | 67 ha |
| 2019 | under 1 ha | 114 ha | 115 ha |
| 2020 | under 1 ha | 509 ha | 510 ha |
| 2021 | under 1 ha | 189 ha | 189 ha |
| 2022 | under 1 ha | 69 ha | 69 ha |
| 2023 | under 1 ha | 67 ha | 67 ha |
| 2024 | under 1 ha | 9 ha | 9 ha |
| 2025 | under 1 ha | 14 ha | 14 ha |
What is causing deforestation around Hildesheim?
- Loggingcan grow back99% · 1,260 ha
Also: farms, pasture and plantations, towns and roads, 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
- 7,380 ha
- Forest in 2020
- 7,320 ha
- Overall change
- −62 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hildesheim stayed about the same size, at about 7,320 hectares: new forest grew on about 383 hectares, and about 445 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 Hildesheim
Same 2 km radius, same index — so they compare directly.
- Hannover28.6 km
Germany
- Tree cover
- 35%
- Air quality
- 97
- Salzgitter31.7 km
Germany
- Tree cover
- 23%
- Air quality
- 80
- Braunschweig41.3 km
Germany
- Tree cover
- 38%
- Air quality
- 80
- Wolfsburg63.8 km
Germany
- Tree cover
- 35%
- Air quality
- 79
- Göttingen68.6 km
Germany
- Tree cover
- 45%
- Air quality
- 42
- Paderborn95.1 km
Germany
- Tree cover
- 44%
- Air quality
- 67
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Frequently asked
Questions about Hildesheim
What is the air quality (AQI) in Hildesheim right now?
The latest reading for Hildesheim shows an AQI of 79 (Moderate), measured Nov 11, 16:00 local time by the Hildesheim Verkehr ground monitoring station, 100 m away, via OpenAQ. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Hildesheim today?
At AQI 79 (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 Hildesheim been like this week?
Over the last 7 days, the CAMS air-quality model put Hildesheim's daily AQI at 68 on average, from 48 on Nov 5 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 Hildesheim lost since 2001?
Since 2001, the area within 10 km of Hildesheim has lost about 1,270 hectares of forest (about 1,800 football pitches): 17% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 2 hectares (under 1%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 70 hectares a year in 2021–2025, down from 141 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Hildesheim stayed about the same size, at about 7,320 hectares: new forest grew on about 383 hectares, and about 445 hectares were lost.
What is the tree count in Hildesheim?
Hildesheim has an estimated 114,177 trees across the 12.48 km² of land measured — 36.6% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Hildesheim need?
Hildesheim has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Hildesheim's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Hildesheim, 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 Hildesheim; the tree count is an estimate derived from that cover.
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