City report · United States
Surprise
Measured across a 2 km radius around Surprise Original Townsite, Surprise, AZ, USA (12.57 km²)
- Tree cover
- 2.3%
- Air quality
- 53Moderate
- Trees in this area
- 7.2K
- More trees needed
- 87.0K
- Area analysed
- 12.57 km²
- Satellite image
- Sep 18, 2026
Surprise's tree count comes to 7,226 trees across 12.57 km² — 28 points below the 30% tree-cover level considered healthy for this area, meaning roughly 87,022 more trees would close the gap. Air quality currently reads AQI 53 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tree cover detail
Critically low
2.3% tree cover against a 30% healthy-neighbourhood target, across 12.57 km².
Trees in this area
7,226
Target trees
94,248
More trees needed
87,022
CO₂ if planted / yr
1,914 t
Air quality detail
AQI 53Moderate
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
9.1
PM10
64.5
NO₂
0.8
O₃
68.0
SO₂
0.3
CO
102.0
Frequently asked
Questions about Surprise
What is the tree count in Surprise?
Surprise has an estimated 7,226 trees across the 12.57 km² measured — 2.3% tree cover, 28 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Surprise need?
Surprise needs roughly 87,022 more trees to close a 28-point shortfall against its 30% tree-cover target — about 1,914 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Surprise right now?
The latest reading for Surprise shows an AQI of 53 (Moderate), observed Sep 21, 16:00 local time via Open-Meteo / CAMS. Unusually sensitive people should consider limiting long outdoor exertion.
How is Surprise'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 Surprise Original Townsite; 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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