City report · United States
Bellevue
Measured across a 2 km radius around West Bellevue, Bellevue, WA, USA (12.57 km²)
- Tree cover
- 55.2%
- Air quality
- 51Moderate
- Trees in this area
- 151K
- More trees needed
- 0
- Area analysed
- 10.94 km²land, in a 12.57 km² circle
- Satellite image
- Sep 16, 2026
Bellevue's tree count comes to 150,872 trees across 10.94 km² of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 51 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tree cover detail
Healthy tree cover
55.2% tree cover against a 30% healthy-neighbourhood target, across 10.94 km² of land.
Trees in this area
150,872
Target trees
150,872
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 51Moderate
Observed Sep 21, 16:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
10.9
PM10
11.1
NO₂
13.2
O₃
86.0
SO₂
2.1
CO
156.0
Frequently asked
Questions about Bellevue
What is the tree count in Bellevue?
Bellevue has an estimated 150,872 trees across the 10.94 km² of land measured — 55.2% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Bellevue need?
Bellevue has already reached its tree-cover target, so no additional trees are needed to close the gap.
What is the air quality (AQI) in Bellevue right now?
The latest reading for Bellevue shows an AQI of 51 (Moderate), observed Sep 21, 16:00 local time via Open-Meteo / CAMS. Unusually sensitive people should consider limiting long outdoor exertion.
How is Bellevue'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 West Bellevue; the tree count is an estimate derived from that cover. Air-quality readings come from Open-Meteo / CAMS and may differ from street-level monitors.
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