City report · United States
Sunnyvale
Measured across a 2 km radius around Sunnyvale, CA, USA (12.57 km²)
- Tree cover
- 19.9%
- Air quality
- 51Moderate
- Trees in this area
- 62.5K
- More trees needed
- 31.7K
- Area analysed
- 12.57 km²
- Satellite image
- Sep 12, 2026
Sunnyvale's tree count comes to 62,518 trees across 12.57 km² — 10 points below the 30% tree-cover level considered healthy for this area, meaning roughly 31,730 more trees would close the gap. Air quality currently reads AQI 51 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tree cover detail
Below target
19.9% tree cover against a 30% healthy-neighbourhood target, across 12.57 km².
Trees in this area
62,518
Target trees
94,248
More trees needed
31,730
CO₂ if planted / yr
698.1 t
Air quality detail
AQI 51Moderate
Observed Sep 21, 18:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
10.4
PM10
15.3
NO₂
2.3
O₃
86.0
SO₂
0.7
CO
121.0
Frequently asked
Questions about Sunnyvale
What is the tree count in Sunnyvale?
Sunnyvale has an estimated 62,518 trees across the 12.57 km² measured — 19.9% tree cover, 10 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Sunnyvale need?
Sunnyvale needs roughly 31,730 more trees to close a 10-point shortfall against its 30% tree-cover target — about 698.1 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Sunnyvale right now?
The latest reading for Sunnyvale shows an AQI of 51 (Moderate), observed Sep 21, 18:00 local time via Open-Meteo / CAMS. Unusually sensitive people should consider limiting long outdoor exertion.
How is Sunnyvale'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 Sunnyvale; 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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