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Airleaf
Aerial study of a dense urban district organized around a green corridor
All Hong Kong reports

City report · Hong Kong

Tseung Kwan O

Measured across a 2 km radius around Hong Kong (12.57 km²)

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
Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured 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.

Target reached

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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Tseung Kwan O tree cover and air quality — measured by Airleaf
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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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Methodology. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search imagery at 10 m detail for the stated radius; 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.