City report · United States
Philadelphia
Measured across a 2 km radius around Center City West, Philadelphia, PA, USA (12.57 km²)
- Tree cover
- 11.5%
- Air quality
- 39Good
- Trees in this area
- 35.3K
- More trees needed
- 56.7K
- Area analysed
- 12.27 km²land, in a 12.57 km² circle
- Satellite image
- Sep 16, 2026
Philadelphia's tree count comes to 35,261 trees across 12.27 km² of land — 19 points below the 30% tree-cover level considered healthy for this area, meaning roughly 56,725 more trees would close the gap. Air quality currently reads AQI 39 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Critically low
11.5% tree cover against a 30% healthy-neighbourhood target, across 12.27 km² of land.
Trees in this area
35,261
Target trees
91,986
More trees needed
56,725
CO₂ if planted / yr
1,248 t
Air quality detail
AQI 39Good
Observed Sep 21, 23:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
9.0
PM10
9.9
NO₂
16.6
O₃
65.0
SO₂
1.7
CO
236.0
Frequently asked
Questions about Philadelphia
What is the tree count in Philadelphia?
Philadelphia has an estimated 35,261 trees across the 12.27 km² of land measured — 11.5% tree cover, 19 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Philadelphia need?
Philadelphia needs roughly 56,725 more trees to close a 19-point shortfall against its 30% tree-cover target — about 1,248 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Philadelphia right now?
The latest reading for Philadelphia shows an AQI of 39 (Good), observed Sep 21, 23:00 local time via Open-Meteo / CAMS. Air quality is satisfactory for everyone.
How is Philadelphia'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 Center City 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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