City report · Auvergne-Rhône-Alpes, France
Grenoble Air quality today
Air quality in Grenoble currently reads AQI 24 (Good): Air quality is satisfactory for everyone.
AQI 24
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 4.4
- tree cover
- 20.7%
- trees in this area
- 64.3K
- more trees needed
- 28.9K
Measured across a 2 km radius around Quartier des Eaux-Claires, 38100 Grenoble, France (12.57 km²), from a satellite image of Sep 23, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Grenoble · AQI 24 (Good)
Grenoble's tree count comes to 64,316 trees across 12.43 km² of land, 9 points below the 30% tree-cover level considered healthy for this area, so roughly 28,895 more trees would close the gap.
Air quality detail
Air quality in Grenoble today: AQI 24, Good
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · St Martin d'Heres, 3 km away · median of 4 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
4.4
PM10
8.8
NO₂
23.8
O₃
17.8
SO₂
4.1
CO
—
Data: OpenAQ · EEA
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Grenoble's daily AQI at 55 on average, from 29 on Nov 9 to an hourly peak of 111 on Nov 5.
Where Grenoble stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Grenoble: Below target
20.7% tree cover against a 30% healthy-neighborhood target, across 12.43 km² of land.
Trees in this area
64,316
Target trees
93,211
More trees needed
28,895
CO₂ if planted / yr
635.7 t
Deforestation · 2001–2025
How much forest has Grenoble lost?
Since 2001, the area within 10 km of Grenoble has lost about 179 hectares of forest (about 250 football pitches): 1.4% of the forest it had in 2000. The biggest cause was wildfires (31%), after which forest can grow back. About 50 hectares (28%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from September 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 179 haabout 250 football pitches
- Share of its forest
- 1.4%of what there was in 2000
- Cleared for good
- 50 hadeforestation: turned into farms, mines or towns
The worst year was 2003, when about 62 hectares of forest were lost, mostly to wildfires.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | 2 ha | 2 ha |
| 2002 | under 1 ha | 2 ha | 2 ha |
| 2003 | 8 ha | 54 ha | 62 ha |
| 2004 | 4 ha | 6 ha | 10 ha |
| 2005 | 2 ha | under 1 ha | 2 ha |
| 2006 | 4 ha | 2 ha | 5 ha |
| 2007 | 1 ha | under 1 ha | 2 ha |
| 2008 | 3 ha | 5 ha | 8 ha |
| 2009 | 6 ha | 3 ha | 10 ha |
| 2010 | under 1 ha | 6 ha | 7 ha |
| 2011 | under 1 ha | 5 ha | 5 ha |
| 2012 | 4 ha | 5 ha | 9 ha |
| 2013 | 1 ha | 2 ha | 4 ha |
| 2014 | under 1 ha | 5 ha | 5 ha |
| 2015 | under 1 ha | under 1 ha | 1 ha |
| 2016 | 2 ha | 5 ha | 7 ha |
| 2017 | under 1 ha | 4 ha | 4 ha |
| 2018 | 1 ha | 3 ha | 4 ha |
| 2019 | under 1 ha | under 1 ha | 2 ha |
| 2020 | 5 ha | 5 ha | 10 ha |
| 2021 | 3 ha | 2 ha | 4 ha |
| 2022 | under 1 ha | 1 ha | 1 ha |
| 2023 | under 1 ha | 5 ha | 5 ha |
| 2024 | 2 ha | 3 ha | 5 ha |
| 2025 | under 1 ha | 3 ha | 3 ha |
What is causing deforestation around Grenoble?
- Wildfirescan grow back31% · 56 ha
- Loggingcan grow back28% · 50 ha
- Towns and roadscleared for good25% · 46 ha
Also: farms, pasture and plantations, storms, floods and other natural causes, 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
- 15,200 ha
- Forest in 2020
- 15,300 ha
- Overall change
- +138 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Grenoble stayed about the same size, at about 15,300 hectares: new forest grew on about 297 hectares, and about 160 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 Grenoble
What is the air quality (AQI) in Grenoble right now?
The latest reading for Grenoble shows an AQI of 24 (Good), measured Nov 11, 17:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is St Martin d'Heres, 3 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Grenoble today?
At AQI 24 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Grenoble been like this week?
Over the last 7 days, the CAMS air-quality model put Grenoble's daily AQI at 55 on average, from 29 on Nov 9 to an hourly peak of 111 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Grenoble lost since 2001?
Since 2001, the area within 10 km of Grenoble has lost about 179 hectares of forest (about 250 football pitches): 1.4% of the forest it had in 2000. The biggest cause was wildfires (31%), after which forest can grow back. About 50 hectares (28%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Grenoble stayed about the same size, at about 15,300 hectares: new forest grew on about 297 hectares, and about 160 hectares were lost.
What is the tree count in Grenoble?
Grenoble has an estimated 64,316 trees across the 12.43 km² of land measured — 20.7% tree cover, 9 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Grenoble need?
Grenoble needs roughly 28,895 more trees to close a 9-point shortfall against its 30% tree-cover target — about 635.7 t of extra CO₂ absorbed per year once grown.
How are Grenoble's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Quartier des Eaux-Claires, 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 Quartier des Eaux-Claires; the tree count is an estimate derived from that cover.
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