- Tree cover
- 7.6%
- Air quality
- 61Moderate
- Trees in this area
- 23.9K
- More trees needed
- 70.4K
- Area analysed
- 12.57 km²
- Satellite image
- Sep 19, 2026
Corona's tree count comes to 23,876 trees across 12.57 km² — 22 points below the 30% tree-cover level considered healthy for this area, meaning roughly 70,372 more trees would close the gap. Air quality currently reads AQI 61 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tree cover detail
Critically low
7.6% tree cover against a 30% healthy-neighbourhood target, across 12.57 km².
Trees in this area
23,876
Target trees
94,248
More trees needed
70,372
CO₂ if planted / yr
1,548 t
Air quality detail
AQI 61Moderate
Observed Sep 21, 20:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
11.0
PM10
14.8
NO₂
8.9
O₃
98.0
SO₂
2.0
CO
142.0
Frequently asked
Questions about Corona
What is the tree count in Corona?
Corona has an estimated 23,876 trees across the 12.57 km² measured — 7.6% tree cover, 22 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Corona need?
Corona needs roughly 70,372 more trees to close a 22-point shortfall against its 30% tree-cover target — about 1,548 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Corona right now?
The latest reading for Corona shows an AQI of 61 (Moderate), observed Sep 21, 20:00 local time via Open-Meteo / CAMS. Unusually sensitive people should consider limiting long outdoor exertion.
How is Corona'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 Corona; the tree count is an estimate derived from that cover. Air-quality readings come from Open-Meteo / CAMS and may differ from street-level monitors.
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