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

City report · Portugal

Viseu

Measured across a 2 km radius around Viseu, Portugal (12.57 km²)

Tree cover
48.2%
Air quality
52Moderate
Trees in this area
151K
More trees needed
0
Area analyzed
12.57 km²
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

Viseu's tree count comes to 151,425 trees across 12.57 km² — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 52 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.

Tree cover detail

Healthy tree cover

48.2% tree cover against a 30% healthy-neighborhood target, across 12.57 km².

Target reached

Trees in this area

151,425

Target trees

151,425

More trees needed

0

CO₂ if planted / yr

0 kg

Air quality detail

AQI 52Moderate

Observed Sep 28, 03:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.

Model estimate · no ground station nearby

Health signal

Unusually sensitive people should consider limiting long outdoor exertion.

PM2.5

12.4

PM10

19.0

NO₂

6.5

O₃

33.0

SO₂

0.7

CO

131.0

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

Questions about Viseu

What is the tree count in Viseu?

Viseu has an estimated 151,425 trees across the 12.57 km² measured — 48.2% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Viseu need?

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

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

The latest reading for Viseu shows an AQI of 52 (Moderate), observed Sep 28, 03:00 local time via Open-Meteo / CAMS, US EPA index. Unusually sensitive people should consider limiting long outdoor exertion.

How is Viseu'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 Viseu; 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.