Sanmenxia
Measured across a 2 km radius around Hubin District, Sanmenxia, Henan, China (12.57 km²)
- Tree cover
- 32.1%
- Air quality
- 117Unhealthy for sensitive groups
- Trees in this area
- 101K
- More trees needed
- 9.1K
- Area analyzed
- 12.54 km²land, in a 12.57 km² circle
- Satellite image
- Sep 6, 2026
Sanmenxia's tree count comes to 100,643 trees across 12.54 km² of land — 3 points below the 35% tree-cover level considered healthy for this area, meaning roughly 9,092 more trees would close the gap. Air quality currently reads AQI 117 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Tree cover detail
Below target
32.1% tree cover against a 35% healthy-neighborhood target, across 12.54 km² of land.
Trees in this area
100,643
Target trees
109,735
More trees needed
9,092
CO₂ if planted / yr
200.0 t
Air quality detail
AQI 117Unhealthy for sensitive groups
Observed Sep 27, 12:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
42.0
PM10
44.5
NO₂
18.3
O₃
109.0
SO₂
10.4
CO
589.0
Frequently asked
Questions about Sanmenxia
What is the tree count in Sanmenxia?
Sanmenxia has an estimated 100,643 trees across the 12.54 km² of land measured — 32.1% tree cover, 3 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Sanmenxia need?
Sanmenxia needs roughly 9,092 more trees to close a 3-point shortfall against its 35% tree-cover target — about 200.0 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Sanmenxia right now?
The latest reading for Sanmenxia shows an AQI of 117 (Unhealthy for sensitive groups), observed Sep 27, 12:00 local time via Open-Meteo / CAMS, US EPA index. Sensitive groups should limit long or intense outdoor activity.
How is Sanmenxia'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 Hubin District; 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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