Most polluted cities in Kenya
0 measured cities, this year.
No city has enough measurements for this window yet.
Estimated: cities without a monitor
Kenya cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Nairobi | ≈ 8 µg/m³ |
| Kakamega | ≈ 22 µg/m³ |
| Mombasa | ≈ 7 µg/m³ |
| Nakuru | ≈ 7 µg/m³ |
| Ruiru | ≈ 8 µg/m³ |
| Eldoret | ≈ 12 µg/m³ |
| Kisumu | ≈ 23 µg/m³ |
| Kikuyu | ≈ 8 µg/m³ |
| Thika | ≈ 5 µg/m³ |
| Naivasha | ≈ 9 µg/m³ |
| Karuri | ≈ 8 µg/m³ |
| Karuri | ≈ 9 µg/m³ |
| Matuga | ≈ 7 µg/m³ |
| Mwala | ≈ 4 µg/m³ |
| Ongata Rongai | ≈ 8 µg/m³ |
| Jomvu | ≈ 7 µg/m³ |
| Garissa | ≈ 4 µg/m³ |
| Kitale | ≈ 7 µg/m³ |
| Limuru | ≈ 8 µg/m³ |
| Juja | ≈ 5 µg/m³ |
| Kitengela | ≈ 3 µg/m³ |
| Kiambu | ≈ 8 µg/m³ |
| Mlolongo | ≈ 8 µg/m³ |
| Malindi | ≈ 7 µg/m³ |
| Mandera | ≈ 4 µg/m³ |
| Khwisero | ≈ 23 µg/m³ |
| Kisii | ≈ 13 µg/m³ |
| Ngong | ≈ 8 µg/m³ |
| Mtwapa | ≈ 7 µg/m³ |
| Wajir | ≈ 3 µg/m³ |
| Lodwar | ≈ 2 µg/m³ |
| Athi River | ≈ 3 µg/m³ |
| Meru | ≈ 5 µg/m³ |
| Nyeri | ≈ 9 µg/m³ |
| Isiolo | ≈ 5 µg/m³ |
| Ukunda | ≈ 7 µg/m³ |
| Kiserian | ≈ 3 µg/m³ |
| Kilifi | ≈ 8 µg/m³ |
| Nanyuki | ≈ 4 µg/m³ |
| Busia | ≈ 22 µg/m³ |
Use this board
SmogRank, most polluted cities in Kenya, PM2.5, this year to 2 Oct 2026, 00:00 UTC, smogrank.com/ke?w=year.
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.
Updated 2026-10-02 00:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.