City report · United States
Boulder
Measured across a 2 km radius around Goss - Grove, Boulder, CO 80302, USA (12.57 km²)
- Tree cover
- 39.5%
- Air quality
- 50Good
- Trees in this area
- 124K
- More trees needed
- 0
- Area analysed
- 12.57 km²
- Satellite image
- Sep 4, 2026
Boulder's tree count comes to 124,093 trees across 12.57 km² — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 50 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Healthy tree cover
39.5% tree cover against a 30% healthy-neighbourhood target, across 12.57 km².
Trees in this area
124,093
Target trees
124,093
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 50Good
Observed Sep 21, 17:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.4
PM10
5.9
NO₂
1.7
O₃
123.0
SO₂
0.8
CO
124.0
Frequently asked
Questions about Boulder
What is the tree count in Boulder?
Boulder has an estimated 124,093 trees across the 12.57 km² measured — 39.5% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Boulder need?
Boulder has already reached its tree-cover target, so no additional trees are needed to close the gap.
What is the air quality (AQI) in Boulder right now?
The latest reading for Boulder shows an AQI of 50 (Good), observed Sep 21, 17:00 local time via Open-Meteo / CAMS. Air quality is satisfactory for everyone.
How is Boulder'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 Goss - Grove; 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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