City report · United States
St. Louis
Measured across a 2 km radius around Downtown, St. Louis, MO, USA (12.57 km²)
- Tree cover
- 13.8%
- Air quality
- 33Good
- Trees in this area
- 38.9K
- More trees needed
- 45.7K
- Area analysed
- 11.29 km²land, in a 12.57 km² circle
- Satellite image
- Sep 14, 2026
St. Louis's tree count comes to 38,932 trees across 11.29 km² of land — 16 points below the 30% tree-cover level considered healthy for this area, meaning roughly 45,703 more trees would close the gap. Air quality currently reads AQI 33 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Critically low
13.8% tree cover against a 30% healthy-neighbourhood target, across 11.29 km² of land.
Trees in this area
38,932
Target trees
84,635
More trees needed
45,703
CO₂ if planted / yr
1,005 t
Air quality detail
AQI 33Good
Observed Sep 21, 22:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.8
PM10
1.8
NO₂
7.9
O₃
57.0
SO₂
2.3
CO
195.0
Frequently asked
Questions about St. Louis
What is the tree count in St. Louis?
St. Louis has an estimated 38,932 trees across the 11.29 km² of land measured — 13.8% tree cover, 16 percentage points short of the 30% tree-cover target set for this area.
How many more trees does St. Louis need?
St. Louis needs roughly 45,703 more trees to close a 16-point shortfall against its 30% tree-cover target — about 1,005 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in St. Louis right now?
The latest reading for St. Louis shows an AQI of 33 (Good), observed Sep 21, 22:00 local time via Open-Meteo / CAMS. Air quality is satisfactory for everyone.
How is St. Louis'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 Downtown; 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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