Air Quality Lab — Saint-Louis, Senegal
Air Quality Profile·
Saint-Louis reports an annual PM2.5 of 40.3 µg/m³. That's above the EU annual limit of 25 µg/m³ — long-term exposure here carries documented health trade-offs.
Saint-Louis
Senegal
SenegalAnnual Average
UnhealthyWHO annual classification
40.3µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
3939 µg/m³ — Unhealthy
5858 µg/m³ — Very Unhealthy
3535 µg/m³ — Poor
3636 µg/m³ — Unhealthy
6363 µg/m³ — Very Unhealthy
5656 µg/m³ — Very Unhealthy
4040 µg/m³ — Unhealthy
2323 µg/m³ — Moderate
2424 µg/m³ — Moderate
4242 µg/m³ — Unhealthy
3434 µg/m³ — Poor
3535 µg/m³ — Poor
Jan
Feb
Mar
Apr
May
Jun
3939 µg/m³ — Unhealthy
5858 µg/m³ — Very Unhealthy
3535 µg/m³ — Poor
3636 µg/m³ — Unhealthy
6363 µg/m³ — Very Unhealthy
5656 µg/m³ — Very Unhealthy
Jul
Aug
Sep
Oct
Nov
Dec
4040 µg/m³ — Unhealthy
2323 µg/m³ — Moderate
2424 µg/m³ — Moderate
4242 µg/m³ — Unhealthy
3434 µg/m³ — Poor
3535 µg/m³ — Poor
Best months: Aug–Sep, NovWorst months: Feb, May–Jun
Moderate15–25 µg/m³Poor25–35 µg/m³Unhealthy35–50 µg/m³Very Unhealthy50–75 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Senegal
Saint-Louis: 40.3 µg/m³. Typical range in Senegal: 29.9–34.4 µg/m³. Low anchor: Kayar, 27.3 µg/m³.
44 cities tracked