City report · United States
Fort Collins
Measured across a 2 km radius around Old Town West, Fort Collins, CO, USA (12.57 km²)
- Tree cover
- 47.9%
- Air quality
- 62Moderate
- Trees in this area
- 150K
- More trees needed
- 0
- Area analysed
- 12.49 km²land, in a 12.57 km² circle
- Satellite image
- Sep 4, 2026
Fort Collins's tree count comes to 149,579 trees across 12.49 km² of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 62 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tree cover detail
Healthy tree cover
47.9% tree cover against a 30% healthy-neighbourhood target, across 12.49 km² of land.
Trees in this area
149,579
Target trees
149,579
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 62Moderate
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
9.0
PM10
9.5
NO₂
12.2
O₃
89.0
SO₂
0.8
CO
181.0
Frequently asked
Questions about Fort Collins
What is the tree count in Fort Collins?
Fort Collins has an estimated 149,579 trees across the 12.49 km² of land measured — 47.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Fort Collins need?
Fort Collins has already reached its tree-cover target, so no additional trees are needed to close the gap.
What is the air quality (AQI) in Fort Collins right now?
The latest reading for Fort Collins shows an AQI of 62 (Moderate), observed Sep 21, 21:00 local time via Open-Meteo / CAMS. Unusually sensitive people should consider limiting long outdoor exertion.
How is Fort Collins'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 Old Town West; 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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