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

City report · Taiwan

Keelung

Measured across a 2 km radius around Keelung, Ren’ai District, Keelung City, Taiwan (12.57 km²)

Tree cover
56.9%
Air quality
45Good
Trees in this area
169K
More trees needed
0
Area analyzed
11.89 km²land, in a 12.57 km² circle
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

Keelung's tree count comes to 169,104 trees across 11.89 km² of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 45 (Good): Air quality is satisfactory for everyone.

Tree cover detail

Healthy tree cover

56.9% tree cover against a 30% healthy-neighborhood target, across 11.89 km² of land.

Target reached

Trees in this area

169,104

Target trees

169,104

More trees needed

0

CO₂ if planted / yr

0 kg

Air quality detail

AQI 45Good

Observed Sep 28, 13:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.

Ground station · Taipei, 16.7 km away · median of 2 stations

Health signal

Air quality is satisfactory for everyone.

PM2.5

10.7

PM10

—

NO₂

—

O₃

—

SO₂

—

CO

—

Data: OpenAQ · AirGradient, MSP, Zhongshan North Road, Taipei

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

Questions about Keelung

What is the tree count in Keelung?

Keelung has an estimated 169,104 trees across the 11.89 km² of land measured — 56.9% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Keelung need?

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

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

The latest reading for Keelung shows an AQI of 45 (Good), measured Sep 28, 13:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Taipei, 16.7 km away). Air quality is satisfactory for everyone.

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