Putian
Measured across a 2 km radius around Chengxiang District, Putian, Fujian, China (12.57 km²)
- Tree cover
- 23.0%
- Air quality
- 156Unhealthy
- Trees in this area
- 72.3K
- More trees needed
- 53.4K
- Area analyzed
- 12.57 km²
- Satellite image
- Sep 19, 2026
Putian's tree count comes to 72,257 trees across 12.57 km² — 17 points below the 40% tree-cover level considered healthy for this area, meaning roughly 53,407 more trees would close the gap. Air quality currently reads AQI 156 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Tree cover detail
Critically low
23.0% tree cover against a 40% healthy-neighborhood target, across 12.57 km².
Trees in this area
72,257
Target trees
125,664
More trees needed
53,407
CO₂ if planted / yr
1,175 t
Air quality detail
AQI 156Unhealthy
Observed Sep 27, 11:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
28.3
PM10
31.0
NO₂
7.9
O₃
173.0
SO₂
12.3
CO
301.0
Frequently asked
Questions about Putian
What is the tree count in Putian?
Putian has an estimated 72,257 trees across the 12.57 km² measured — 23.0% tree cover, 17 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Putian need?
Putian needs roughly 53,407 more trees to close a 17-point shortfall against its 40% tree-cover target — about 1,175 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Putian right now?
The latest reading for Putian shows an AQI of 156 (Unhealthy), observed Sep 27, 11:00 local time via Open-Meteo / CAMS, US EPA index. Everyone should limit long outdoor exertion; sensitive groups more so.
How is Putian'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 Chengxiang 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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