City report · Saint Barthelemy
Gustavia Air quality today
Air quality in Gustavia currently reads AQI 23 (Good): Air quality is satisfactory for everyone.
AQI 23
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 4.1
- tree cover
- 59.8%
- trees in this area
- 69.7K
- more trees needed
- 0
Measured across a 2 km radius around Gustavia, Saint Barthelemy (12.57 km²), from a satellite image of Jul 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Gustavia · AQI 23 (Good)
Gustavia's tree count comes to 69,699 trees across 4.66 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Gustavia today: AQI 23, Good
Main pollutant: PM2.5 · Observed Nov 11, 07:00 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
4.1
PM10
6.5
NO₂
0.4
O₃
47.0
SO₂
1.2
CO
109.0
- 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 Gustavia's daily AQI at 30 on average, from 9 on Nov 9 to an hourly peak of 66 on Nov 5.
Where Gustavia stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Gustavia: Healthy tree cover
59.8% tree cover against a 30% healthy-neighborhood target, across 4.66 km² of land.
Trees in this area
69,699
Target trees
69,699
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Gustavia lost?
Since 2001, the area within 10 km of Gustavia has lost about 2 hectares of forest: under 1% of the forest it had in 2000. The satellites couldn't tell what caused most of it. Almost none of it was deforestation, meaning forest cleared for good.
2017: satellite photo from February 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 2 ha
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- under 1 hadeforestation: turned into farms, mines or towns
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 | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 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 | under 1 ha | under 1 ha | under 1 ha |
Forest gained and lost, 2000–2020
- Forest in 2000
- 713 ha
- Forest in 2020
- 685 ha
- Overall change
- −28 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Gustavia shrank from about 713 hectares to 685 hectares, a net loss of about 28 hectares (−3.9%). New forest grew on about 3 hectares, but 31 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 Gustavia
Same 2 km radius, same index — so they compare directly.
- Philipsburg25.3 km
Sint Maarten
- Tree cover
- 29%
- Air quality
- 12
- Marigot31.2 km
Saint Martin
- Tree cover
- 43%
- Air quality
- 12
- The Valley41.9 km
Anguilla
- Tree cover
- 55%
- Air quality
- 8
- Basseterre68.1 km
Saint Kitts and Nevis
- Tree cover
- 19%
- Air quality
- 41
- Saint John’s137.2 km
Antigua and Barbuda
- Tree cover
- 29%
- Air quality
- 34
- Plymouth148.7 km
Montserrat
- Tree cover
- 59%
- Air quality
- 28
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Frequently asked
Questions about Gustavia
What is the air quality (AQI) in Gustavia right now?
The latest reading for Gustavia shows an AQI of 23 (Good), observed Nov 11, 07:00 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 Gustavia today?
At AQI 23 (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 Gustavia been like this week?
Over the last 7 days, the CAMS air-quality model put Gustavia's daily AQI at 30 on average, from 9 on Nov 9 to an hourly peak of 66 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 Gustavia lost since 2001?
Since 2001, the area within 10 km of Gustavia has lost about 2 hectares of forest: under 1% of the forest it had in 2000. The satellites couldn't tell what caused most of it. Almost none of it was deforestation, meaning forest cleared for good. Comparing satellite maps from 2000 and 2020, the forest around Gustavia shrank from about 713 hectares to 685 hectares, a net loss of about 28 hectares (−3.9%). New forest grew on about 3 hectares, but 31 hectares were lost.
What is the tree count in Gustavia?
Gustavia has an estimated 69,699 trees across the 4.66 km² of land measured — 59.8% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Gustavia need?
Gustavia has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Gustavia'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 Gustavia; the tree count is an estimate derived from that cover.
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