Most polluted cities in Saint-Louis, Senegal

1 measured city ranked by PM2.5, last 7 days. Worst: Saint-Louis at 17.8 µg/m³, #186 in the world.

#	City		µg/m³
1	Saint-Louis low-cost sensorsSaint-Louis		17.8

Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

Updated 2026-10-01 04:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.