City report · United Kingdom · England
St Helens
Measured across a 1.2 mi (2 km) radius around St Helens, Saint Helens, UK (4.9 sq mi)
- Tree cover
- 43.4%
- Air quality
- 30Good
- Trees in this area
- 136K
- More trees needed
- 0
- Area analyzed
- 4.8 sq miland, in a 4.9 sq mi circle
- Satellite image
- Aug 24, 2026
St Helens's tree count comes to 136,209 trees across 4.8 sq mi (12.56 km²) of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 30 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Healthy tree cover
43.4% tree cover against a 30% healthy-neighborhood target, across 4.8 sq mi (12.56 km²) of land.
Trees in this area
136,209
Target trees
136,209
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 30Good
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
7.1
PM10
10.3
NO₂
12.7
O₃
39.0
SO₂
0.9
CO
184.0
Frequently asked
Questions about St Helens
What is the tree count in St Helens?
St Helens has an estimated 136,209 trees across the 4.8 sq mi (12.56 km²) of land measured — 43.4% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does St Helens need?
St Helens has already reached its tree-cover target, so no additional trees are needed to close the gap.
What is the air quality (AQI) in St Helens right now?
The latest reading for St Helens shows an AQI of 30 (Good), observed Sep 27, 05:00 local time via Open-Meteo / CAMS, US EPA index. Air quality is satisfactory for everyone.
How is St Helens'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 St Helens; 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.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same tree-cover and air-quality breakdown.
Check my address