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Airleaf
Aerial study of a dense urban district organized around a green corridor
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City report · Taiwan

Sanxia

Measured across a 2 km radius around New Taipei, Banqiao District, New Taipei City, Taiwan (12.57 km²)

Tree cover
56.7%
Air quality
15Good
Trees in this area
178K
More trees needed
0
Area analyzed
12.57 km²
Satellite image
Sep 26, 2026
Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Sep 26, 2026

Sanxia's tree count comes to 178,128 trees across 12.57 km² — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 15 (Good): Air quality is satisfactory for everyone.

Tree cover detail

Healthy tree cover

56.7% tree cover against a 30% healthy-neighborhood target, across 12.57 km².

Target reached

Trees in this area

178,128

Target trees

178,128

More trees needed

0

CO₂ if planted / yr

0 kg

Air quality detail

AQI 15Good

Observed Sep 28, 14:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.

Ground station · Nankan, Taoyuan, 14.2 km away · median of 4 stations

Health signal

Air quality is satisfactory for everyone.

PM2.5

3.7

PM10

—

NO₂

—

O₃

—

SO₂

—

CO

—

Data: OpenAQ · AirGradient, Clarity, DCJW, ideaSky, Zhongshan North Road, Taipei

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Sanxia tree cover and air quality — measured by Airleaf
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Frequently asked

Questions about Sanxia

What is the tree count in Sanxia?

Sanxia has an estimated 178,128 trees across the 12.57 km² measured — 56.7% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Sanxia need?

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

What is the air quality (AQI) in Sanxia right now?

The latest reading for Sanxia shows an AQI of 15 (Good), measured Sep 28, 14:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Nankan, Taoyuan, 14.2 km away). Air quality is satisfactory for everyone.

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