- Tree cover
- 9.6%
- Air quality
- 64Moderate
- Trees in this area
- 30.2K
- More trees needed
- 64.1K
- Area analysed
- 12.57 km²
- Satellite image
- Sep 19, 2026
Downey's tree count comes to 30,159 trees across 12.57 km² — 20 points below the 30% tree-cover level considered healthy for this area, meaning roughly 64,088 more trees would close the gap. Air quality currently reads AQI 64 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tree cover detail
Critically low
9.6% tree cover against a 30% healthy-neighbourhood target, across 12.57 km².
Trees in this area
30,159
Target trees
94,247
More trees needed
64,088
CO₂ if planted / yr
1,410 t
Air quality detail
AQI 64Moderate
Observed Sep 21, 16:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
14.0
PM10
19.0
NO₂
4.7
O₃
123.0
SO₂
2.8
CO
148.0
Frequently asked
Questions about Downey
What is the tree count in Downey?
Downey has an estimated 30,159 trees across the 12.57 km² measured — 9.6% tree cover, 20 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Downey need?
Downey needs roughly 64,088 more trees to close a 20-point shortfall against its 30% tree-cover target — about 1,410 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Downey right now?
The latest reading for Downey shows an AQI of 64 (Moderate), observed Sep 21, 16:00 local time via Open-Meteo / CAMS. Unusually sensitive people should consider limiting long outdoor exertion.
How is Downey'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 Downey; 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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