Air Quality Lab — Makeni, Sierra Leone
Air Quality Profile·
Makeni reports an annual PM2.5 of 26.4 µg/m³. That's above the EU annual limit of 25 µg/m³ — long-term exposure here carries documented health trade-offs.
Makeni
Sierra Leone
Sierra LeoneAnnual Average
PoorWHO annual classification
26.4µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
4444 µg/m³ — Unhealthy
4242 µg/m³ — Unhealthy
3535 µg/m³ — Unhealthy
3737 µg/m³ — Unhealthy
2525 µg/m³ — Poor
1212 µg/m³ — Fair
1313 µg/m³ — Fair
1515 µg/m³ — Moderate
1212 µg/m³ — Fair
2020 µg/m³ — Moderate
2626 µg/m³ — Poor
3535 µg/m³ — Unhealthy
Jan
Feb
Mar
Apr
May
Jun
4444 µg/m³ — Unhealthy
4242 µg/m³ — Unhealthy
3535 µg/m³ — Unhealthy
3737 µg/m³ — Unhealthy
2525 µg/m³ — Poor
1212 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1313 µg/m³ — Fair
1515 µg/m³ — Moderate
1212 µg/m³ — Fair
2020 µg/m³ — Moderate
2626 µg/m³ — Poor
3535 µg/m³ — Unhealthy
Best months: Jun–Jul, SepWorst months: Jan–Feb, Apr
Fair10–15 µg/m³Moderate15–25 µg/m³Poor25–35 µg/m³Unhealthy35–50 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Sierra Leone
Makeni: 26.4 µg/m³. Typical range in Sierra Leone: 23.7–26.5 µg/m³. Low anchor: Bumpe, 23.3 µg/m³. High anchor: Freetown, 27.9 µg/m³.
12 cities tracked