All Aland Islands reports
City report · Aland Islands
Mariehamn
Measured across a 2 km radius around Mariehamn, Åland (12.57 km²)
- Tree cover
- 45%
- Air quality
- 30Good
- Trees in this area
- 92.0K
- More trees needed
- 0
- Area analysed
- 12.57 km²
- Satellite image
- Sep 14, 2026
Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Sep 14, 2026
Tree cover detail
Healthy tree cover
45.4% tree cover against a 30% healthy-neighbourhood target, across 12.57 km².
Trees in this area
91,970
Target trees
91,970
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 30Good
Observed Sep 20, 2026 via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.7
PM10
9
NO₂
1.7
O₃
63
SO₂
0.1
CO
160
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