City report · Pays de la Loire, France
Le Mans Air quality today
Air quality in Le Mans currently reads AQI 54 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 54
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 10.6
- tree cover
- 27.9%
- trees in this area
- 87.5K
- more trees needed
- 6.6K
Measured across a 2 km radius around Bollée, 72100 Le Mans, France (12.57 km²), from a satellite image of Sep 14, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Le Mans · AQI 54 (Moderate)
Le Mans's tree count comes to 87,475 trees across 12.54 km² of land, 2 points below the 30% tree-cover level considered healthy for this area, so roughly 6,584 more trees would close the gap.
Air quality detail
Air quality in Le Mans today: AQI 54, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 16:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Sources, Le Mans, Loire, France, 3.7 km away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
10.6
PM10
14.0
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Air Pays de la Loire
- 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 Le Mans's daily AQI at 56 on average, from 41 on Nov 10 to an hourly peak of 74 on Nov 6.
Where Le Mans stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Le Mans: Below target
27.9% tree cover against a 30% healthy-neighborhood target, across 12.54 km² of land.
Trees in this area
87,475
Target trees
94,059
More trees needed
6,584
CO₂ if planted / yr
144.8 t
Deforestation · 2001–2025
How much forest has Le Mans lost?
Since 2001, the area within 10 km of Le Mans has lost about 807 hectares of forest (about 1,100 football pitches): 12% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 121 hectares (15%) 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
- 807 haabout 1,100 football pitches
- Share of its forest
- 12%of what there was in 2000
- Cleared for good
- 121 hadeforestation: turned into farms, mines or towns
Forest loss is speeding up: about 51 hectares a year in 2021–2025, up from 37 hectares a year in 2016–2020. The worst year was 2023, when about 138 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 | 1 ha | 2 ha |
| 2002 | 2 ha | 6 ha | 8 ha |
| 2003 | 2 ha | 8 ha | 10 ha |
| 2004 | 3 ha | 24 ha | 27 ha |
| 2005 | 2 ha | 11 ha | 13 ha |
| 2006 | 19 ha | 11 ha | 29 ha |
| 2007 | 9 ha | 23 ha | 31 ha |
| 2008 | 8 ha | 15 ha | 23 ha |
| 2009 | 8 ha | 21 ha | 29 ha |
| 2010 | 10 ha | 72 ha | 82 ha |
| 2011 | 1 ha | 8 ha | 9 ha |
| 2012 | 10 ha | 35 ha | 45 ha |
| 2013 | 6 ha | 11 ha | 16 ha |
| 2014 | 3 ha | 28 ha | 31 ha |
| 2015 | 1 ha | 10 ha | 11 ha |
| 2016 | 2 ha | 62 ha | 64 ha |
| 2017 | under 1 ha | 22 ha | 23 ha |
| 2018 | 9 ha | 16 ha | 25 ha |
| 2019 | 5 ha | 28 ha | 33 ha |
| 2020 | 2 ha | 37 ha | 39 ha |
| 2021 | 12 ha | 42 ha | 54 ha |
| 2022 | 2 ha | 15 ha | 17 ha |
| 2023 | 4 ha | 134 ha | 138 ha |
| 2024 | under 1 ha | 31 ha | 31 ha |
| 2025 | under 1 ha | 15 ha | 16 ha |
What is causing deforestation around Le Mans?
- Loggingcan grow back83% · 669 ha
- Towns and roadscleared for good15% · 119 ha
- Unknown causescause unknown2.1% · 17 ha
Also: farms, pasture and plantations.
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
- 6,600 ha
- Forest in 2020
- 6,980 ha
- Overall change
- +376 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Le Mans grew from about 6,600 hectares to 6,980 hectares, a net gain of about 376 hectares (+5.7%). New forest grew on about 811 hectares, while 435 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 Le Mans
What is the air quality (AQI) in Le Mans right now?
The latest reading for Le Mans shows an AQI of 54 (Moderate), measured Nov 11, 16:00 local time by the Sources, Le Mans, Loire, France ground monitoring station, 3.7 km 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 Le Mans today?
At AQI 54 (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 Le Mans been like this week?
Over the last 7 days, the CAMS air-quality model put Le Mans's daily AQI at 56 on average, from 41 on Nov 10 to an hourly peak of 74 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 Le Mans lost since 2001?
Since 2001, the area within 10 km of Le Mans has lost about 807 hectares of forest (about 1,100 football pitches): 12% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 121 hectares (15%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is speeding up: about 51 hectares a year in 2021–2025, up from 37 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Le Mans grew from about 6,600 hectares to 6,980 hectares, a net gain of about 376 hectares (+5.7%). New forest grew on about 811 hectares, while 435 hectares were lost.
What is the tree count in Le Mans?
Le Mans has an estimated 87,475 trees across the 12.54 km² of land measured — 27.9% tree cover, 2 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Le Mans need?
Le Mans needs roughly 6,584 more trees to close a 2-point shortfall against its 30% tree-cover target — about 144.8 t of extra CO₂ absorbed per year once grown.
How are Le Mans's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Bollée, 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 Bollée; the tree count is an estimate derived from that cover.
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