Air quality by country
Air quality in Sierra Leone today
Updated
Moderate: average US AQI 56 across 3 cities Worst now: Kenema (61); cleanest: Waterloo, Western Area (53).
Live US AQI, PM2.5 and ozone for cities across Sierra Leone, ranked from most polluted to cleanest.
- Average US AQI
- 56 Moderate
- Most polluted now
- Kenema AQI 61
- Cleanest now
- Waterloo, Western Area AQI 53
- Cities above 100
- 0 unhealthy for sensitive groups or worse
Air quality in Sierra Leone today
Right now the modelled air quality in Sierra Leone averages a US AQI of 56 (Moderate) across the 3 cities we track. By category: 3 Moderate (of 3).
That is 11 points better than the worldwide average of 67 across 4,024 cities.
Kenema has the worst air at 61 with PM2.5 at 15 µg/m³, while Waterloo, Western Area is cleanest at 53. No tracked city is above 100, the level where sensitive groups are advised to cut back outdoors.
Sierra Leone cities by AQI (most polluted first)
| City | Region | US AQI | Category | PM2.5 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Kenema | Eastern Province | 61 | Moderate | 14.5 | 66 |
| Freetown | Western Area | 53 | Moderate | 10.5 | 72 |
| Waterloo, Western Area | Western Area | 53 | Moderate | 10.5 | 72 |
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Modelled by CAMS (Copernicus) via Open-Meteo, refreshed twice a day; read hour by hour from the forecast.
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Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).