
- Tree cover
- 75.0%
- Air quality
- 70Moderate
- Trees in this area
- 234K
- More trees needed
- 0
- Area analyzed
- 12.51 km²land, in a 12.57 km² circle
- Satellite image
- Sep 25, 2026
Tseung Kwan O's tree count comes to 234,441 trees across 12.51 km² of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 70 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tree cover detail
Healthy tree cover
75.0% tree cover against a 30% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
234,441
Target trees
234,441
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 70Moderate
Observed Sep 28, 10:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Kennedy Road, Wanchai, 10 km away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
21.0
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient
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Frequently asked
Questions about Tseung Kwan O
What is the tree count in Tseung Kwan O?
Tseung Kwan O has an estimated 234,441 trees across the 12.51 km² of land measured — 75.0% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Tseung Kwan O need?
Tseung Kwan O has already reached its tree-cover target, so no additional trees are needed to close the gap.
What is the air quality (AQI) in Tseung Kwan O right now?
The latest reading for Tseung Kwan O shows an AQI of 70 (Moderate), measured Sep 28, 10:00 local time by the Kennedy Road, Wanchai ground monitoring station, 10 km away, via OpenAQ. Unusually sensitive people should consider limiting long outdoor exertion.
How is Tseung Kwan O's tree cover and air quality measured?
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 Hong Kong; the tree count is an estimate derived from that cover. Air quality is measured by ground monitoring stations near Hong Kong, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate.
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