City report · Indonesia · Central Java
Semarang
Measured across a 2 km radius around Semarang, Semarang City, Central Java, Indonesia (12.57 km²)
- Tree cover
- 10.7%
- Air quality
- 122Unhealthy for sensitive groups
- Trees in this area
- 33.6K
- More trees needed
- 76.3K
- Area analyzed
- 12.57 km²
- Satellite image
- Sep 24, 2026
Semarang's tree count comes to 33,615 trees across 12.57 km² — 24 points below the 35% tree-cover level considered healthy for this area, meaning roughly 76,341 more trees would close the gap. Air quality currently reads AQI 122 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Tree cover detail
Critically low
10.7% tree cover against a 35% healthy-neighborhood target, across 12.57 km².
Trees in this area
33,615
Target trees
109,956
More trees needed
76,341
CO₂ if planted / yr
1,680 t
Air quality detail
AQI 122Unhealthy for sensitive groups
Observed Sep 27, 09:00 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
43.9
PM10
49.0
NO₂
11.1
O₃
122.0
SO₂
21.5
CO
330.0
Frequently asked
Questions about Semarang
What is the tree count in Semarang?
Semarang has an estimated 33,615 trees across the 12.57 km² measured — 10.7% tree cover, 24 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Semarang need?
Semarang needs roughly 76,341 more trees to close a 24-point shortfall against its 35% tree-cover target — about 1,680 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Semarang right now?
The latest reading for Semarang shows an AQI of 122 (Unhealthy for sensitive groups), observed Sep 27, 09:00 local time via Open-Meteo / CAMS, US EPA index. Sensitive groups should limit long or intense outdoor activity.
How is Semarang'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 Semarang; 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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