Carolina vs Road Town
Tree cover and air quality for both, measured the same way: Sentinel-2 imagery at 10 m detail over a 2 km radius from each city centre, and the live US EPA air quality index. Same radius and same index, so the two numbers compare directly.
Road Town has more tree cover — 71.8% against 44.0%.
Road Town has cleaner air right now — AQI 20 against 21.
- Tree cover gap
- 27.8 points
- Road Town is ahead.
- Air quality gap
- 1 AQI
- Road Town is cleaner.
- Trees between them
- 55.0K
- Road Town has more standing.
Tree cover
Share of the 2 km radius under canopy.
44.0%
71.8%
Air quality index
US EPA index, live, with its band. Lower is better.
21 · Good
20 · Good
Trees standing
Estimated from the measured canopy area.
137K
192K
Trees still needed
To reach the same canopy target. Fewer is better.
0
0
CO₂ absorbed each year
By the trees already standing.
3.0M kg
4.2M kg
Air quality in detail
What each city is breathing
Concentrations in µg/m³, measured at the same moment as the index above. Lower is better in every row. Carolina is read from nearby ground stations and Road Town is modelled — worth knowing, since the two are not quite like for like.
PM2.5
Fine particles, the pollutant that usually sets the index.
5 µg/m³
4.8 µg/m³
The last week, day by day
A single reading can catch a city on a bad afternoon. The week says whether it was the weather or the place.
| Day | Carolina | Road Town |
|---|---|---|
| 22 Sept | 21 | 19 |
| 23 Sept | 15 | 16 |
| 24 Sept | 18 | 18 |
| 25 Sept | 32 | 43 |
| 26 Sept | 55 | 46 |
| 27 Sept | 20 | 19 |
| 28 Sept | 14 | 19 |
Reading these numbers
What is actually being measured
Tree cover
The share of ground under canopy inside a 2 km radius of each city centre, read from Sentinel-2 satellite imagery at 10 m detail. It is a measurement of that circle, not of the whole municipality — which is exactly what makes the two comparable, since city boundaries are drawn to wildly different rules around the world. Road Town leads here at 71.8%.
Air quality index
The live US EPA index, computed from current pollutant concentrations — ground stations where a city has them nearby, and a model everywhere else. It moves hour to hour, so this is a snapshot rather than a verdict on either place: Carolina reads 21 (good) and Road Town reads 20 (good) right now.
Frequently asked
Carolina and Road Town, answered
Which has more trees, Carolina or Road Town?
Road Town, with roughly 192,408 trees inside its 2 km radius against 137,401. Tree cover tells a slightly different story from raw count: Road Town has the denser canopy at 71.8%.
Which has better air quality, Carolina or Road Town?
Road Town right now, at AQI 20 against 21 — a gap of 1 points. This is a live reading rather than an annual average, so it can reverse within a day.
How many more trees does each city need?
Carolina needs about 0 more to reach its canopy target, and Road Town about 0. The target is the same share of ground for both, so the figures are directly comparable.
Are these two measured the same way?
Yes — that is the point of the page. Identical radius, identical satellite source at 10 m detail, and the same US EPA index for air. Nothing here is adjusted for population, city limits or climate, so the numbers describe the same-sized circle of ground in each place.
Keep going
Other comparisons nearby
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- Carolina vs Arecibo53% tree cover · AQI 13Compare
- Carolina vs Charlotte Amalie45% tree cover · AQI 20Compare
- Carolina vs Saint Croix24% tree cover · AQI 19Compare
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