City report · United States
Worcester
Measured across a 2 km radius around Central Business District, Worcester, MA, USA (12.57 km²)
- Tree cover
- 36.8%
- Air quality
- 33Good
- Trees in this area
- 115K
- More trees needed
- 0
- Area analysed
- 12.51 km²land, in a 12.57 km² circle
- Satellite image
- Sep 15, 2026
Worcester's tree count comes to 115,033 trees across 12.51 km² of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 33 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Healthy tree cover
36.8% tree cover against a 30% healthy-neighbourhood target, across 12.51 km² of land.
Trees in this area
115,033
Target trees
115,033
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 33Good
Observed Sep 21, 23:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.6
PM10
5.9
NO₂
11.1
O₃
49.0
SO₂
0.7
CO
185.0
Frequently asked
Questions about Worcester
What is the tree count in Worcester?
Worcester has an estimated 115,033 trees across the 12.51 km² of land measured — 36.8% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Worcester need?
Worcester has already reached its tree-cover target, so no additional trees are needed to close the gap.
What is the air quality (AQI) in Worcester right now?
The latest reading for Worcester shows an AQI of 33 (Good), observed Sep 21, 23:00 local time via Open-Meteo / CAMS. Air quality is satisfactory for everyone.
How is Worcester'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 Central Business District; 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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