City report · United States
Ann Arbor
Measured across a 2 km radius around Ann Arbor, MI, USA (12.57 km²)
- Tree cover
- 63.1%
- Air quality
- 31Good
- Trees in this area
- 197K
- More trees needed
- 0
- Area analysed
- 12.52 km²land, in a 12.57 km² circle
- Satellite image
- Aug 28, 2026
Ann Arbor's tree count comes to 197,442 trees across 12.52 km² of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 31 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Healthy tree cover
63.1% tree cover against a 30% healthy-neighbourhood target, across 12.52 km² of land.
Trees in this area
197,442
Target trees
197,442
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 31Good
Observed Sep 21, 19:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.1
PM10
6.5
NO₂
8.5
O₃
58.0
SO₂
2.0
CO
165.0
Frequently asked
Questions about Ann Arbor
What is the tree count in Ann Arbor?
Ann Arbor has an estimated 197,442 trees across the 12.52 km² of land measured — 63.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Ann Arbor need?
Ann Arbor has already reached its tree-cover target, so no additional trees are needed to close the gap.
What is the air quality (AQI) in Ann Arbor right now?
The latest reading for Ann Arbor shows an AQI of 31 (Good), observed Sep 21, 19:00 local time via Open-Meteo / CAMS. Air quality is satisfactory for everyone.
How is Ann Arbor'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 Ann Arbor; 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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