City report · United States
Denver
Measured across a 2 km radius around Capitol Hill, Denver, CO, USA (12.57 km²)
- Tree cover
- 22.7%
- Air quality
- 51Moderate
- Trees in this area
- 71.2K
- More trees needed
- 22.9K
- Area analysed
- 12.54 km²land, in a 12.57 km² circle
- Satellite image
- Sep 9, 2026
Denver's tree count comes to 71,172 trees across 12.54 km² of land — 7 points below the 30% tree-cover level considered healthy for this area, meaning roughly 22,888 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
22.7% tree cover against a 30% healthy-neighbourhood target, across 12.54 km² of land.
Trees in this area
71,172
Target trees
94,060
More trees needed
22,888
CO₂ if planted / yr
503.5 t
Air quality detail
AQI 51Moderate
Observed Sep 21, 21:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
9.7
PM10
10.0
NO₂
32.5
O₃
46.0
SO₂
0.8
CO
153.0
Frequently asked
Questions about Denver
What is the tree count in Denver?
Denver has an estimated 71,172 trees across the 12.54 km² of land measured — 22.7% tree cover, 7 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Denver need?
Denver needs roughly 22,888 more trees to close a 7-point shortfall against its 30% tree-cover target — about 503.5 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Denver right now?
The latest reading for Denver shows an AQI of 51 (Moderate), observed Sep 21, 21:00 local time via Open-Meteo / CAMS. Unusually sensitive people should consider limiting long outdoor exertion.
How is Denver'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 Capitol Hill; 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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