City report · United States
Portland
Measured across a 2 km radius around Old Town, Portland, OR, USA (12.57 km²)
- Tree cover
- 22.8%
- Air quality
- 50Good
- Trees in this area
- 62.5K
- More trees needed
- 19.7K
- Area analysed
- 10.97 km²land, in a 12.57 km² circle
- Satellite image
- Sep 16, 2026
Portland's tree count comes to 62,532 trees across 10.97 km² of land — 7 points below the 30% tree-cover level considered healthy for this area, meaning roughly 19,747 more trees would close the gap. Air quality currently reads AQI 50 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Below target
22.8% tree cover against a 30% healthy-neighbourhood target, across 10.97 km² of land.
Trees in this area
62,532
Target trees
82,279
More trees needed
19,747
CO₂ if planted / yr
434.4 t
Air quality detail
AQI 50Good
Observed Sep 21, 18:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.2
PM10
6.5
NO₂
6.1
O₃
66.0
SO₂
1.0
CO
140.0
Frequently asked
Questions about Portland
What is the tree count in Portland?
Portland has an estimated 62,532 trees across the 10.97 km² of land measured — 22.8% tree cover, 7 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Portland need?
Portland needs roughly 19,747 more trees to close a 7-point shortfall against its 30% tree-cover target — about 434.4 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Portland right now?
The latest reading for Portland shows an AQI of 50 (Good), observed Sep 21, 18:00 local time via Open-Meteo / CAMS. Air quality is satisfactory for everyone.
How is Portland'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; 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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