City report · Reunion
Saint-Leu Air quality today
Air quality in Saint-Leu currently reads AQI 32 (Good): Air quality is satisfactory for everyone.
AQI 32
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 5.1
- tree cover
- 57.3%
- trees in this area
- 96.7K
- more trees needed
- 0
Measured across a 2 km radius around Saint-Leu, 97436, Réunion (12.57 km²), from a satellite image of Sep 14, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Saint-Leu · AQI 32 (Good)
Saint-Leu's tree count comes to 96,667 trees across 6.75 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Saint-Leu today: AQI 32, Good
Main pollutant: PM2.5 · Observed Nov 11, 04:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.1
PM10
8.1
NO₂
3.2
O₃
30.0
SO₂
1.2
CO
147.0
- 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 Saint-Leu's daily AQI at 39 on average, from 25 on Nov 7 to an hourly peak of 54 on Nov 10.
Where Saint-Leu stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Saint-Leu: Healthy tree cover
57.3% tree cover against a 30% healthy-neighborhood target, across 6.75 km² of land.
Trees in this area
96,667
Target trees
96,667
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Saint-Leu lost?
Since 2001, the area within 10 km of Saint-Leu has lost about 775 hectares of forest (about 1,100 football pitches): 6.6% of the forest it had in 2000. Most of it (89%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 775 haabout 1,100 football pitches
- Share of its forest
- 6.6%of what there was in 2000
- Cleared for good
- 692 hadeforestation: turned into farms, mines or towns
The worst year was 2013, when about 291 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 | 5 ha | under 1 ha | 5 ha |
| 2002 | 69 ha | 4 ha | 72 ha |
| 2003 | 11 ha | under 1 ha | 11 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | 14 ha | under 1 ha | 15 ha |
| 2006 | 66 ha | 2 ha | 68 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | 28 ha | under 1 ha | 28 ha |
| 2010 | 36 ha | under 1 ha | 37 ha |
| 2011 | 39 ha | 3 ha | 42 ha |
| 2012 | 86 ha | 18 ha | 104 ha |
| 2013 | 246 ha | 45 ha | 291 ha |
| 2014 | 54 ha | 4 ha | 58 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 | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | 39 ha | 6 ha | 44 ha |
What is causing deforestation around Saint-Leu?
- Farms, pasture and plantationscleared for good88% · 686 ha
- Loggingcan grow back5.8% · 45 ha
- Wildfirescan grow back3.3% · 26 ha
Also: towns and roads, shifting farming, 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.
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. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Saint-Leu
Same 2 km radius, same index — so they compare directly.
- Saint-Denis36.2 km
Reunion
- Tree cover
- 38%
- Air quality
- 24
- Saint-Benoît46.7 km
Reunion
- Tree cover
- 47%
- Air quality
- 16
- Vacoas247.6 km
Mauritius
- Tree cover
- 36%
- Air quality
- 10
- Port Louis255.9 km
Mauritius
- Tree cover
- 28%
- Air quality
- 45
Build your own
Compare Saint-Leu with anywhere
This place
Saint-Leu
Use this data
Put Saint-Leu's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Saint-Leu
What is the air quality (AQI) in Saint-Leu right now?
The latest reading for Saint-Leu shows an AQI of 32 (Good), observed Nov 11, 04:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Saint-Leu today?
At AQI 32 (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 Saint-Leu been like this week?
Over the last 7 days, the CAMS air-quality model put Saint-Leu's daily AQI at 39 on average, from 25 on Nov 7 to an hourly peak of 54 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Saint-Leu lost since 2001?
Since 2001, the area within 10 km of Saint-Leu has lost about 775 hectares of forest (about 1,100 football pitches): 6.6% of the forest it had in 2000. Most of it (89%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
What is the tree count in Saint-Leu?
Saint-Leu has an estimated 96,667 trees across the 6.75 km² of land measured — 57.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Saint-Leu need?
Saint-Leu has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Saint-Leu'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 Saint-Leu; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address