City report · United Kingdom · Wales
Cardiff
Measured across a 1.2 mi (2 km) radius around City Centre, Cardiff, UK (4.9 sq mi)
- Tree cover
- 21.5%
- Air quality
- 33Good
- Trees in this area
- 67.0K
- More trees needed
- 26.5K
- Area analyzed
- 4.8 sq miland, in a 4.9 sq mi circle
- Satellite image
- Aug 11, 2026
Cardiff's tree count comes to 67,004 trees across 4.8 sq mi (12.47 km²) of land — 9 points below the 30% tree-cover level considered healthy for this area, meaning roughly 26,490 more trees would close the gap. Air quality currently reads AQI 33 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Below target
21.5% tree cover against a 30% healthy-neighborhood target, across 4.8 sq mi (12.47 km²) of land.
Trees in this area
67,004
Target trees
93,494
More trees needed
26,490
CO₂ if planted / yr
582.8 t
Air quality detail
AQI 33Good
Observed Sep 27, 05:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
4.2
PM10
8.5
NO₂
3.7
O₃
70.0
SO₂
0.4
CO
167.0
Frequently asked
Questions about Cardiff
What is the tree count in Cardiff?
Cardiff has an estimated 67,004 trees across the 4.8 sq mi (12.47 km²) of land measured — 21.5% tree cover, 9 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Cardiff need?
Cardiff needs roughly 26,490 more trees to close a 9-point shortfall against its 30% tree-cover target — about 582.8 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Cardiff right now?
The latest reading for Cardiff shows an AQI of 33 (Good), observed Sep 27, 05:00 local time via Open-Meteo / CAMS, US EPA index. Air quality is satisfactory for everyone.
How is Cardiff'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 1.2 mi (2 km) radius around City Centre; 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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