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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

San Tung Chung Hang

Measured across a 2 km radius around Tung Chung, New Territories, Hong Kong (12.57 km²)

Tree cover
81.8%
Air quality
28Good
Trees in this area
229K
More trees needed
0
Area analyzed
11.19 km²land, in a 12.57 km² circle
Satellite image
Aug 8, 2026
Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Aug 8, 2026

San Tung Chung Hang's tree count comes to 228,714 trees across 11.19 km² of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 28 (Good): Air quality is satisfactory for everyone.

Tree cover detail

Healthy tree cover

81.8% tree cover against a 30% healthy-neighborhood target, across 11.19 km² of land.

Target reached

Trees in this area

228,714

Target trees

228,714

More trees needed

0

CO₂ if planted / yr

0 kg

Air quality detail

AQI 28Good

Observed Sep 28, 08:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.

Ground station · Kennedy Road, Wanchai, 23.6 km away

Health signal

Air quality is satisfactory for everyone.

PM2.5

6.6

PM10

—

NO₂

—

O₃

—

SO₂

—

CO

—

Data: OpenAQ · AirGradient

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San Tung Chung Hang tree cover and air quality — measured by Airleaf
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Frequently asked

Questions about San Tung Chung Hang

What is the tree count in San Tung Chung Hang?

San Tung Chung Hang has an estimated 228,714 trees across the 11.19 km² of land measured — 81.8% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does San Tung Chung Hang need?

San Tung Chung Hang has already reached its tree-cover target, so no additional trees are needed to close the gap.

What is the air quality (AQI) in San Tung Chung Hang right now?

The latest reading for San Tung Chung Hang shows an AQI of 28 (Good), measured Sep 28, 08:00 local time by the Kennedy Road, Wanchai ground monitoring station, 23.6 km away, via OpenAQ. Air quality is satisfactory for everyone.

How is San Tung Chung Hang'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 Tung Chung; the tree count is an estimate derived from that cover. Air quality is measured by ground monitoring stations near Tung Chung, 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 Tung Chung, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate.