City report · United States
Santa Ana
Measured across a 2 km radius around Downtown, Santa Ana, CA, USA (12.57 km²)
- Tree cover
- 8.0%
- Air quality
- 45Good
- Trees in this area
- 25.1K
- More trees needed
- 69.1K
- Area analysed
- 12.57 km²
- Satellite image
- Sep 19, 2026
Santa Ana's tree count comes to 25,133 trees across 12.57 km² — 22 points below the 30% tree-cover level considered healthy for this area, meaning roughly 69,115 more trees would close the gap. Air quality currently reads AQI 45 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Critically low
8.0% tree cover against a 30% healthy-neighbourhood target, across 12.57 km².
Trees in this area
25,133
Target trees
94,248
More trees needed
69,115
CO₂ if planted / yr
1,521 t
Air quality detail
AQI 45Good
Observed Sep 21, 16:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
7.4
PM10
11.3
NO₂
1.8
O₃
101.0
SO₂
0.8
CO
128.0
Frequently asked
Questions about Santa Ana
What is the tree count in Santa Ana?
Santa Ana has an estimated 25,133 trees across the 12.57 km² measured — 8.0% tree cover, 22 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Santa Ana need?
Santa Ana needs roughly 69,115 more trees to close a 22-point shortfall against its 30% tree-cover target — about 1,521 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Santa Ana right now?
The latest reading for Santa Ana shows an AQI of 45 (Good), observed Sep 21, 16:00 local time via Open-Meteo / CAMS. Air quality is satisfactory for everyone.
How is Santa Ana'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 Downtown; 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.
See your own area
What does your neighbourhood look like?
Pick any point and radius to get the same tree-cover and air-quality breakdown.
Check my address