City report · Grand Est, France
Metz Air quality today
Air quality in Metz currently reads AQI 87 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 87
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 22.7
- tree cover
- 29.7%
- trees in this area
- 89.8K
- more trees needed
- 907
Measured across a 2 km radius around Ancienne Ville, Metz, France (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Metz · AQI 87 (Moderate)
Metz's tree count comes to 89,760 trees across 12.09 km² of land, 0 points below the 30% tree-cover level considered healthy for this area, so roughly 907 more trees would close the gap.
Air quality detail
Air quality in Metz today: AQI 87, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 03:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 165 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 165 km, e.g. Nancy and Luxembourg
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
22.7
PM10
11.0
NO₂
11.3
O₃
23.0
SO₂
0.4
CO
218.0
- 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 Metz's daily AQI at 80 on average, from 61 on Nov 5 to an hourly peak of 115 on Nov 6.
Where Metz stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Metz: Below target
29.7% tree cover against a 30% healthy-neighborhood target, across 12.09 km² of land.
Trees in this area
89,760
Target trees
90,667
More trees needed
907
CO₂ if planted / yr
20.0 t
Deforestation · 2001–2025
How much forest has Metz lost?
Since 2001, the area within 10 km of Metz has lost about 163 hectares of forest (about 230 football pitches): 2.4% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 38 hectares (23%) 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 southeast of the city center.
- Forest lost since 2001
- 163 haabout 230 football pitches
- Share of its forest
- 2.4%of what there was in 2000
- Cleared for good
- 38 hadeforestation: turned into farms, mines or towns
The worst year was 2008, when about 25 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 | 2 ha | 2 ha |
| 2003 | under 1 ha | 7 ha | 7 ha |
| 2004 | under 1 ha | 3 ha | 3 ha |
| 2005 | under 1 ha | 2 ha | 2 ha |
| 2006 | 3 ha | 5 ha | 7 ha |
| 2007 | 2 ha | under 1 ha | 3 ha |
| 2008 | 7 ha | 18 ha | 25 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | 6 ha | 12 ha | 18 ha |
| 2011 | 3 ha | 2 ha | 5 ha |
| 2012 | under 1 ha | under 1 ha | 1 ha |
| 2013 | 3 ha | under 1 ha | 3 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | 1 ha | 1 ha |
| 2016 | 1 ha | 1 ha | 2 ha |
| 2017 | 1 ha | 18 ha | 19 ha |
| 2018 | under 1 ha | 10 ha | 10 ha |
| 2019 | under 1 ha | 20 ha | 21 ha |
| 2020 | 4 ha | 5 ha | 9 ha |
| 2021 | under 1 ha | 4 ha | 5 ha |
| 2022 | under 1 ha | 2 ha | 2 ha |
| 2023 | 3 ha | 6 ha | 9 ha |
| 2024 | under 1 ha | 6 ha | 7 ha |
| 2025 | 1 ha | 1 ha | 2 ha |
What is causing deforestation around Metz?
- Loggingcan grow back69% · 113 ha
- Towns and roadscleared for good21% · 34 ha
- Farms, pasture and plantationscleared for good2.3% · 4 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
- 8,260 ha
- Forest in 2020
- 8,600 ha
- Overall change
- +338 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Metz grew from about 8,260 hectares to 8,600 hectares, a net gain of about 338 hectares (+4.1%). New forest grew on about 495 hectares, while 157 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 Metz
Same 2 km radius, same index — so they compare directly.
- Nancy48.3 km
France
- Tree cover
- 21%
- Air quality
- 17
- Luxembourg54.6 km
Luxembourg
- Tree cover
- 36%
- Air quality
- 50
- Saarbrücken62.1 km
Germany
- Tree cover
- 50%
- Air quality
- 74
- Trier78.4 km
Germany
- Tree cover
- 47%
- Air quality
- 53
- Strasbourg129.6 km
France
- Tree cover
- 26%
- Air quality
- 148
- Reims156.7 km
France
- Tree cover
- 17%
- Air quality
- 24
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Frequently asked
Questions about Metz
What is the air quality (AQI) in Metz right now?
The latest reading for Metz shows an AQI of 87 (Moderate), observed Nov 11, 03:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 165 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Metz today?
At AQI 87 (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 Metz been like this week?
Over the last 7 days, the CAMS air-quality model put Metz's daily AQI at 80 on average, from 61 on Nov 5 to an hourly peak of 115 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Metz lost since 2001?
Since 2001, the area within 10 km of Metz has lost about 163 hectares of forest (about 230 football pitches): 2.4% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 38 hectares (23%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Metz grew from about 8,260 hectares to 8,600 hectares, a net gain of about 338 hectares (+4.1%). New forest grew on about 495 hectares, while 157 hectares were lost.
What is the tree count in Metz?
Metz has an estimated 89,760 trees across the 12.09 km² of land measured — 29.7% tree cover, 0 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Metz need?
Metz needs roughly 907 more trees to close a 0-point shortfall against its 30% tree-cover target — about 20.0 t of extra CO₂ absorbed per year once grown.
How are Metz's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 Ancienne Ville; the tree count is an estimate derived from that cover.
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