Niiza
Measured across a 2 km radius around 3 Chome-3 Niiza, Saitama 352-0006, Japan (12.57 km²)
- Tree cover
- 20.5%
- Air quality
- 49Good
- Trees in this area
- 64.4K
- More trees needed
- 29.8K
- Area analyzed
- 12.57 km²
- Satellite image
- Jul 25, 2026
Niiza's tree count comes to 64,403 trees across 12.57 km² — 10 points below the 30% tree-cover level considered healthy for this area, meaning roughly 29,845 more trees would close the gap. Air quality currently reads AQI 49 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Below target
20.5% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
64,403
Target trees
94,248
More trees needed
29,845
CO₂ if planted / yr
656.6 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
190.0
Frequently asked
Questions about Niiza
What is the tree count in Niiza?
Niiza has an estimated 64,403 trees across the 12.57 km² measured — 20.5% tree cover, 10 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Niiza need?
Niiza needs roughly 29,845 more trees to close a 10-point shortfall against its 30% tree-cover target — about 656.6 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Niiza right now?
The latest reading for Niiza 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 Niiza'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 3 Chome-3 Niiza; 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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