Most polluted cities in Kenya
0 measured cities ranked by PM2.5, last 7 days.
No city has enough measurements for this window yet.
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data
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 estimated | ≈ 8 µg/m³ |
| Kakamega estimated | ≈ 22 µg/m³ |
| Mombasa estimated | ≈ 7 µg/m³ |
| Nakuru estimated | ≈ 7 µg/m³ |
| Ruiru estimated | ≈ 8 µg/m³ |
| Eldoret estimated | ≈ 12 µg/m³ |
| Kisumu estimated | ≈ 23 µg/m³ |
| Kikuyu estimated | ≈ 8 µg/m³ |
| Thika estimated | ≈ 5 µg/m³ |
| Naivasha estimated | ≈ 9 µg/m³ |
| Karuri estimated | ≈ 8 µg/m³ |
| Karuri estimated | ≈ 9 µg/m³ |
| Matuga estimated | ≈ 7 µg/m³ |
| Mwala estimated | ≈ 4 µg/m³ |
| Ongata Rongai estimated | ≈ 8 µg/m³ |
| Jomvu estimated | ≈ 7 µg/m³ |
| Garissa estimated | ≈ 4 µg/m³ |
| Kitale estimated | ≈ 7 µg/m³ |
| Limuru estimated | ≈ 8 µg/m³ |
| Juja estimated | ≈ 5 µg/m³ |
| Kitengela estimated | ≈ 3 µg/m³ |
| Kiambu estimated | ≈ 8 µg/m³ |
| Mlolongo estimated | ≈ 8 µg/m³ |
| Malindi estimated | ≈ 7 µg/m³ |
| Mandera estimated | ≈ 4 µg/m³ |
| Khwisero estimated | ≈ 23 µg/m³ |
| Kisii estimated | ≈ 13 µg/m³ |
| Ngong estimated | ≈ 8 µg/m³ |
| Mtwapa estimated | ≈ 7 µg/m³ |
| Wajir estimated | ≈ 3 µg/m³ |
| Lodwar estimated | ≈ 2 µg/m³ |
| Athi River estimated | ≈ 3 µg/m³ |
| Meru estimated | ≈ 5 µg/m³ |
| Nyeri estimated | ≈ 9 µg/m³ |
| Isiolo estimated | ≈ 5 µg/m³ |
| Ukunda estimated | ≈ 7 µg/m³ |
| Kiserian estimated | ≈ 3 µg/m³ |
| Kilifi estimated | ≈ 8 µg/m³ |
| Nanyuki estimated | ≈ 4 µg/m³ |
| Busia estimated | ≈ 22 µg/m³ |
Updated 2026-10-01 14:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.