Right now
The most recent data we hold from World Air Quality Index arrived 3 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, <1 km from here.
Reported by World Air Quality Index today.
No stronger detection stands among the 15 recorded within 20 km of this point since 28 May 2026 — 4 others scored the same. The last comparable one was on 5 September 2026.
What the source measured
World Air Quality Index reported: AQI 150 (Unhealthy) at Ross Road Hospital
The air quality index read 150 (Unhealthy) at the Ross Road Hospital station.
An estimated 161,174 people live within 5 km of this point.
This is the lowest air quality index we have recorded at this point, over 22 readings since 6 September 2026 — the previous range was 150 to 170.
Nearby, since 28 May 2026
- September 5, 2026 · score 50 · 0.0 km
- September 6, 2026 · score 50 · 0.9 km
- September 4, 2026 · score 50 · 0.9 km
How we know
One source: World Air Quality Index. Not yet confirmed by a second, independent source.
Our own score for this event is 50 out of 100, at 63 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Air Quality |
| Severity | Medium |
| Calamity Score (ours) | 50 / 100 |
| Our confidence | 63% |
| Coordinates | 8.4886, -13.2107 |
| Nearest City | Freetown (3 km) |
| Population Exposed | 161.2K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-06T07:00:00.000Z |
| Source | https://aqicn.org/city/@-1716352 |
Score Breakdown
Technical Details
| Aqi | 150 |
| AqiCategory | Unhealthy |
| StationName | Ross Road Hospital |
| StationUid | -1716352 |
Safety Information
When air quality is hazardous: stay indoors with windows closed, and run a filtered air purifier if you have one. Avoid outdoor exercise. Children, older adults and anyone with heart or lung conditions are affected first and worst — an N95 respirator helps outdoors, a cloth mask does not.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens near Freetown?
Calamity.live data shows a air quality event with CalamityScore 50/100, near Freetown (Sierra Leone), based on data from waqi. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.