Right now
The most recent data we hold from World Air Quality Index arrived 2 hours ago, and this point is in it.
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 6 recorded within 20 km of this point since 16 April 2026 — 2 others scored the same. The last comparable one was on 12 September 2026. 2 more were recorded here in the fortnight before it.
What the source measured
World Air Quality Index reported: AQI 159 (Unhealthy) at Cancer Hospital, Kaifeng (开封肿瘤医院)
The air quality index read 159 (Unhealthy) at the Cancer Hospital, Kaifeng (开封肿瘤医院) station.
An estimated 216,249 people live within 5 km of this point.
Nearby, since 16 April 2026
- September 12, 2026 · score 50 · 0.0 km
- September 11, 2026 · score 50 · 0.0 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 | 34.7781, 114.3389 |
| Nearest City | Kaifeng (4 km) |
| Population Exposed | 216.2K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-13T12:00:00.000Z |
| Source | https://aqicn.org/city/@3726 |
Score Breakdown
Technical Details
| Aqi | 159 |
| AqiCategory | Unhealthy |
| StationName | Cancer Hospital, Kaifeng (开封肿瘤医院) |
| StationUid | 3726 |
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.
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