City report · Rheinland-Pfalz, Germany
Mainz Air quality today
Air quality in Mainz currently reads AQI 68 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 68
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 18.3
- tree cover
- 43.8%
- trees in this area
- 126K
- more trees needed
- 0
Measured across a 2 km radius around Mainz, Germany (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Mainz · AQI 68 (Moderate)
Mainz's tree count comes to 125,906 trees across 11.5 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Mainz today: AQI 68, 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 · Mainz-Zitadelle, 1.5 km away · median of 5 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
18.3
PM10
24.2
NO₂
24.7
O₃
3.4
SO₂
1.0
CO
475.4
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 Mainz's daily AQI at 72 on average, from 43 on Nov 4 to an hourly peak of 97 on Nov 7.
Where Mainz stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Mainz: Healthy tree cover
43.8% tree cover against a 30% healthy-neighborhood target, across 11.5 km² of land.
Trees in this area
125,906
Target trees
125,906
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Mainz lost?
Since 2001, the area within 10 km of Mainz has lost about 51 hectares of forest (about 72 football pitches): 1.6% of the forest it had in 2000. The biggest cause was logging (41%), after which forest can grow back. About 21 hectares (40%) 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
- 51 haabout 72 football pitches
- Share of its forest
- 1.6%of what there was in 2000
- Cleared for good
- 21 hadeforestation: turned into farms, mines or towns
The worst year was 2021, when about 6 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 | 2 ha | 2 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | 2 ha | 3 ha | 5 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | 3 ha | 2 ha | 5 ha |
| 2008 | under 1 ha | 1 ha | 1 ha |
| 2009 | 1 ha | 1 ha | 3 ha |
| 2010 | 2 ha | under 1 ha | 3 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 1 ha | 1 ha | 3 ha |
| 2013 | under 1 ha | under 1 ha | 2 ha |
| 2014 | 1 ha | 2 ha | 3 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | 5 ha | 5 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | 6 ha | 6 ha |
| 2022 | 2 ha | 3 ha | 4 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | 3 ha | under 1 ha | 3 ha |
| 2025 | 2 ha | under 1 ha | 2 ha |
What is causing deforestation around Mainz?
- Loggingcan grow back41% · 21 ha
- Towns and roadscleared for good35% · 18 ha
- Farms, pasture and plantationscleared for good5.3% · 3 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
- 7,050 ha
- Forest in 2020
- 7,370 ha
- Overall change
- +320 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Mainz grew from about 7,050 hectares to 7,370 hectares, a net gain of about 320 hectares (+4.5%). New forest grew on about 417 hectares, while 97 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 Mainz
Same 2 km radius, same index — so they compare directly.
- Darmstadt29.2 km
Germany
- Tree cover
- 34%
- Air quality
- 80
- Frankfurt am Main32.5 km
Germany
- Tree cover
- 34%
- Air quality
- 61
- Mannheim56.4 km
Germany
- Tree cover
- 22%
- Air quality
- 90
- Koblenz64.8 km
Germany
- Tree cover
- 42%
- Air quality
- 60
- Heidelberg70.4 km
Germany
- Tree cover
- 54%
- Air quality
- 110
- Siegen100.9 km
Germany
- Tree cover
- 58%
- Air quality
- 46
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Frequently asked
Questions about Mainz
What is the air quality (AQI) in Mainz right now?
The latest reading for Mainz shows an AQI of 68 (Moderate), measured Nov 11, 17:00 local time by 5 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Mainz-Zitadelle, 1.5 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Mainz today?
At AQI 68 (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 Mainz been like this week?
Over the last 7 days, the CAMS air-quality model put Mainz's daily AQI at 72 on average, from 43 on Nov 4 to an hourly peak of 97 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 Mainz lost since 2001?
Since 2001, the area within 10 km of Mainz has lost about 51 hectares of forest (about 72 football pitches): 1.6% of the forest it had in 2000. The biggest cause was logging (41%), after which forest can grow back. About 21 hectares (40%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Mainz grew from about 7,050 hectares to 7,370 hectares, a net gain of about 320 hectares (+4.5%). New forest grew on about 417 hectares, while 97 hectares were lost.
What is the tree count in Mainz?
Mainz has an estimated 125,906 trees across the 11.5 km² of land measured — 43.8% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Mainz need?
Mainz has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Mainz's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Mainz, 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 Mainz; the tree count is an estimate derived from that cover.
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