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

City report · Finland

Lahti

Measured across a 2 km radius around Lahti, Finland (12.57 km²)

Tree cover
61.2%
Air quality
20Good
Trees in this area
180K
More trees needed
0
Area analyzed
11.74 km²land, in a 12.57 km² circle
Satellite image
Sep 7, 2026
Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Sep 7, 2026

Lahti's tree count comes to 179,576 trees across 11.74 km² of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 20 (Good): Air quality is satisfactory for everyone.

Tree cover detail

Healthy tree cover

61.2% tree cover against a 30% healthy-neighborhood target, across 11.74 km² of land.

Target reached

Trees in this area

179,576

Target trees

179,576

More trees needed

0

CO₂ if planted / yr

0 kg

Air quality detail

AQI 20Good

Observed Sep 28, 13:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.

Model estimate · no ground station nearby

Health signal

Air quality is satisfactory for everyone.

PM2.5

3.2

PM10

4.5

NO₂

4.1

O₃

55.0

SO₂

0.3

CO

181.0

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

Questions about Lahti

What is the tree count in Lahti?

Lahti has an estimated 179,576 trees across the 11.74 km² of land measured — 61.2% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Lahti need?

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

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

The latest reading for Lahti shows an AQI of 20 (Good), observed Sep 28, 13:00 local time via Open-Meteo / CAMS, US EPA index. Air quality is satisfactory for everyone.

How is Lahti'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 Lahti; the tree count is an estimate derived from that cover. Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors.

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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 comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors.