Koshigaya
Measured across a 2 km radius around 2 Chome-7 Koshigaya, Saitama 343-0813, Japan (12.57 km²)
- Tree cover
- 9.1%
- Air quality
- 49Good
- Trees in this area
- 28.6K
- More trees needed
- 65.6K
- Area analyzed
- 12.56 km²land, in a 12.57 km² circle
- Satellite image
- Jul 25, 2026
Koshigaya's tree count comes to 28,560 trees across 12.56 km² of land — 21 points below the 30% tree-cover level considered healthy for this area, meaning roughly 65,594 more trees would close the gap. Air quality currently reads AQI 49 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Critically low
9.1% tree cover against a 30% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
28,560
Target trees
94,154
More trees needed
65,594
CO₂ if planted / yr
1,443 t
Air quality detail
AQI 49Good
Observed Sep 27, 11:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
7.4
PM10
8.3
NO₂
5.9
O₃
104.0
SO₂
6.4
CO
160.0
Frequently asked
Questions about Koshigaya
What is the tree count in Koshigaya?
Koshigaya has an estimated 28,560 trees across the 12.56 km² of land measured — 9.1% tree cover, 21 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Koshigaya need?
Koshigaya needs roughly 65,594 more trees to close a 21-point shortfall against its 30% tree-cover target — about 1,443 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Koshigaya right now?
The latest reading for Koshigaya shows an AQI of 49 (Good), observed Sep 27, 11:00 local time via Open-Meteo / CAMS, US EPA index. Air quality is satisfactory for everyone.
How is Koshigaya'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 2 Chome-7 Koshigaya; the tree count is an estimate derived from that cover. Air-quality readings come from Open-Meteo / CAMS, US EPA index and may differ from street-level monitors.
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