Dar es Salaam vs Malindi
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.
Malindi has more tree cover — 39.7% against 11.1%.
Malindi has cleaner air right now — AQI 28 against 35.
- Tree cover gap
- 28.6 points
- Malindi is ahead.
- Air quality gap
- 7 AQI
- Malindi is cleaner.
- Trees between them
- 67.2K
- Malindi has more standing.
Tanzania
Kenya
Tree cover
Share of the 2 km radius under canopy.
11.1%
39.7%
Air quality index
US EPA index, live, with its band. Lower is better.
35 · Good
28 · Good
Trees standing
Estimated from the measured canopy area.
34.8K
102K
Trees still needed
To reach the same canopy target. Fewer is better.
59.3K
0
CO₂ absorbed each year
By the trees already standing.
766K kg
2.2M 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. Both are modelled, with no ground station close enough to either.
PM2.5
Fine particles, the pollutant that usually sets the index.
8.4 µg/m³
6.6 µg/m³
PM10
Coarser particles — dust, pollen, road grit.
11.1 µg/m³
10.7 µg/m³
Nitrogen dioxide
Mostly traffic and combustion.
5.3 µg/m³
1 µg/m³
Ozone
Forms in sunlight; peaks on hot, still afternoons.
23 µg/m³
35 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 | Dar es Salaam | Malindi |
|---|---|---|
| 22 Sept | 45 | 40 |
| 23 Sept | 40 | 32 |
| 24 Sept | 40 | 39 |
| 25 Sept | 36 | 35 |
| 26 Sept | 38 | 29 |
| 27 Sept | 36 | 21 |
| 28 Sept | 34 | 27 |
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. Malindi leads here at 39.7%.
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: Dar es Salaam reads 35 (good) and Malindi reads 28 (good) right now.
Frequently asked
Dar es Salaam and Malindi, answered
Which has more trees, Dar es Salaam or Malindi?
Malindi, with roughly 102,022 trees inside its 2 km radius against 34,837. Tree cover tells a slightly different story from raw count: Malindi has the denser canopy at 39.7%.
Which has better air quality, Dar es Salaam or Malindi?
Malindi right now, at AQI 28 against 35 — a gap of 7 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?
Dar es Salaam needs about 59,317 more to reach its canopy target, and Malindi 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
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