City report · Sao Tome and Principe
São Tomé Air quality today
Air quality in São Tomé currently reads AQI 23 (Good): Air quality is satisfactory for everyone.
AQI 23
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 4.2
- tree cover
- 50.1%
- trees in this area
- 102K
- more trees needed
- 0
Measured across a 2 km radius around São Tomé, São Tomé and Príncipe (12.57 km²), from a satellite image of Jul 7, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
São Tomé · AQI 23 (Good)
São Tomé's tree count comes to 101,991 trees across 8.15 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in São Tomé today: AQI 23, 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
4.2
PM10
6.7
NO₂
0.3
O₃
51.0
SO₂
0.3
CO
152.0
- 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 São Tomé's daily AQI at 32 on average, from 22 on Nov 10 to an hourly peak of 51 on Nov 7.
Where São Tomé stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in São Tomé: Healthy tree cover
50.1% tree cover against a 30% healthy-neighborhood target, across 8.15 km² of land.
Trees in this area
101,991
Target trees
101,991
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has São Tomé lost?
There was almost no forest around São Tomé in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
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 São Tomé
Same 2 km radius, same index — so they compare directly.
- Port-Gentil256.6 km
Gabon
- Tree cover
- 4%
- Air quality
- 11
- Libreville302.9 km
Gabon
- Tree cover
- 12%
- Air quality
- 53
- Bata377.8 km
Equatorial Guinea
- Tree cover
- 19%
- Air quality
- 31
- Malabo443.2 km
Equatorial Guinea
- Tree cover
- 9%
- Air quality
- 40
- Ciudad de la Paz476.0 km
Equatorial Guinea
- Tree cover
- 52%
- Air quality
- 26
- Buguma489.3 km
Nigeria
- Tree cover
- 58%
- Air quality
- 102
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Frequently asked
Questions about São Tomé
What is the air quality (AQI) in São Tomé right now?
The latest reading for São Tomé shows an AQI of 23 (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 São Tomé 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 São Tomé been like this week?
Over the last 7 days, the CAMS air-quality model put São Tomé's daily AQI at 32 on average, from 22 on Nov 10 to an hourly peak of 51 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around São Tomé lost since 2001?
There was almost no forest around São Tomé in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
What is the tree count in São Tomé?
São Tomé has an estimated 101,991 trees across the 8.15 km² of land measured — 50.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does São Tomé need?
São Tomé has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are São Tomé'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 São Tomé; the tree count is an estimate derived from that cover.
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