City report · South Korea · North Chungcheong
Cheongju-si
Measured across a 2 km radius around Sajik-daero, Sangdang-gu, Cheongju-si, Chungcheongbuk-do, South Korea (12.57 km²)
- Tree cover
- 30.4%
- Air quality
- 113Unhealthy for sensitive groups
- Trees in this area
- 95.4K
- More trees needed
- 14.4K
- Area analyzed
- 12.56 km²land, in a 12.57 km² circle
- Satellite image
- Sep 23, 2026
Cheongju-si's tree count comes to 95,409 trees across 12.56 km² of land — 5 points below the 35% tree-cover level considered healthy for this area, meaning roughly 14,437 more trees would close the gap. Air quality currently reads AQI 113 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Tree cover detail
Below target
30.4% tree cover against a 35% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
95,409
Target trees
109,846
More trees needed
14,437
CO₂ if planted / yr
317.6 t
Air quality detail
AQI 113Unhealthy for sensitive groups
Observed Sep 27, 13:00 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
11.0
PM10
12.3
NO₂
1.1
O₃
146.0
SO₂
5.2
CO
238.0
Frequently asked
Questions about Cheongju-si
What is the tree count in Cheongju-si?
Cheongju-si has an estimated 95,409 trees across the 12.56 km² of land measured — 30.4% tree cover, 5 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Cheongju-si need?
Cheongju-si needs roughly 14,437 more trees to close a 5-point shortfall against its 35% tree-cover target — about 317.6 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Cheongju-si right now?
The latest reading for Cheongju-si shows an AQI of 113 (Unhealthy for sensitive groups), observed Sep 27, 13:00 local time via Open-Meteo / CAMS, US EPA index. Sensitive groups should limit long or intense outdoor activity.
How is Cheongju-si'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 Sajik-daero; 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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