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City report · Hong Kong
Hong Kong
Measured across a 2 km radius around Wan Chai, Hong Kong Island, Hong Kong (12.57 km²)
- Tree cover
- 38%
- Air quality
- 116Unhealthy for sensitive groups
- Trees in this area
- 92.7K
- More trees needed
- 0
- Area analysed
- 12.57 km²
- Satellite image
- Sep 10, 2026
Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Sep 10, 2026
Tree cover detail
Healthy tree cover
37.8% tree cover against a 35% healthy-neighbourhood target, across 12.57 km².
Trees in this area
92,684
Target trees
92,684
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 116Unhealthy for sensitive groups
Observed Sep 20, 2026 via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
35.2
PM10
40.9
NO₂
54.8
O₃
123
SO₂
59.2
CO
272
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