Reported by World Air Quality Index today.
No stronger detection stands among the 12 recorded within 20 km of this point since 12 March 2026 — one other scored the same. The last comparable one was on 27 August 2026.
What the source measured
World Air Quality Index reported: AQI 150 (Unhealthy) at United Nations International School of Hanoi, Vietnam (Trường Quốc tế Liên Hợp Quốc Hà Nội)
The air quality index read 150 (Unhealthy) at the United Nations International School of Hanoi, Vietnam (Trường Quốc tế Liên Hợp Quốc Hà Nội) station.
An estimated 116,219 people live within 5 km of this point.
Nearby, since 12 March 2026
- August 27, 2026 · score 35 · 0.0 km
- May 16, 2026 · score 35 · 8.6 km
- August 27, 2026 · score 44 · 8.8 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 66 % 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 | 66% |
| Coordinates | 21.0811, 105.8180 |
| Nearest City | Tây Hồ (1 km) |
| Population Exposed | 116.2K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T23:00:00.000Z |
| Source | https://aqicn.org/city/@8688 |
Score Breakdown
Technical Details
| Aqi | 150 |
| AqiCategory | Unhealthy |
| StationName | United Nations International School of Hanoi, Vietnam (Trường Quốc tế Liên Hợp Quốc Hà Nội) |
| StationUid | 8688 |
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 Tây Hồ?
Calamity.live data shows a air quality event with CalamityScore 50/100, near Tây Hồ (Vietnam), based on data from waqi. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.