Bandundu Province vs Nkayi
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.
Bandundu Province has more tree cover — 35.9% against 8.8%.
Bandundu Province has cleaner air right now — AQI 55 against 92.
- Tree cover gap
- 27.1 points
- Bandundu Province is ahead.
- Air quality gap
- 37 AQI
- Bandundu Province is cleaner.
- Trees between them
- 83.2K
- Bandundu Province has more standing.
Democratic Republic of the Congo
Republic of the Congo
Tree cover
Share of the 2 km radius under canopy.
35.9%
8.8%
Air quality index
US EPA index, live, with its band. Lower is better.
55 · Moderate
92 · Moderate
Trees standing
Estimated from the measured canopy area.
111K
27.6K
Trees still needed
To reach the same canopy target. Fewer is better.
0
66.6K
CO₂ absorbed each year
By the trees already standing.
2.4M kg
608K 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. Nkayi is read from nearby ground stations and Bandundu Province is modelled — worth knowing, since the two are not quite like for like.
PM2.5
Fine particles, the pollutant that usually sets the index.
13.8 µg/m³
31.7 µg/m³
PM10
Coarser particles — dust, pollen, road grit.
14.1 µg/m³
34 µg/m³
Nitrogen dioxide
Mostly traffic and combustion.
2.4 µg/m³
7.7 µg/m³
Ozone
Forms in sunlight; peaks on hot, still afternoons.
51 µg/m³
42 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 | Bandundu Province | Nkayi |
|---|---|---|
| 22 Sept | 81 | 54 |
| 23 Sept | 71 | 82 |
| 24 Sept | 70 | 101 |
| 25 Sept | 88 | 89 |
| 26 Sept | 96 | 66 |
| 27 Sept | 90 | 81 |
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. Bandundu Province leads here at 35.9%.
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: Bandundu Province reads 55 (moderate) and Nkayi reads 92 (moderate) right now.
Frequently asked
Bandundu Province and Nkayi, answered
Which has more trees, Bandundu Province or Nkayi?
Bandundu Province, with roughly 110,866 trees inside its 2 km radius against 27,646. Tree cover tells a slightly different story from raw count: Bandundu Province has the denser canopy at 35.9%.
Which has better air quality, Bandundu Province or Nkayi?
Bandundu Province right now, at AQI 55 against 92 — a gap of 37 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?
Bandundu Province needs about 0 more to reach its canopy target, and Nkayi about 66,602. 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
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