Right now
The most recent data we hold from World Air Quality Index arrived 21 minutes ago, and this point is in it.
3 other detections within 20 km in the last 24 hours, the nearest 5 km from here.
Reported by World Air Quality Index today.
It is the 4th strongest of the 6 detections recorded within 20 km of this point since 27 April 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
World Air Quality Index reported: AQI 154 (Unhealthy) at Banking College, Zhengzhou (郑州银行学校)
The air quality index read 154 (Unhealthy) at the Banking College, Zhengzhou (郑州银行学校) station.
Urban PEI: 117,745 within a heuristic 5 km radius; not unique people.
Nearby, since 27 April 2026
- September 27, 2026 · score 59 · 5.3 km
- September 26, 2026 · score 59 · 5.3 km
- September 19, 2026 · score 59 · 5.3 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. 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 |
| Legacy data-support index | 0.68/1 |
| Coordinates | 34.8019, 113.6750 |
| Nearest City | Zhengzhou (5 km) |
| Urban exposure index (PEI) | 117.7K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-27T01:00:00.000Z |
| Source | https://aqicn.org/city/@1315 |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: waqi. Occurrence: 2026-09-27T01:00:00.000Z.
First archived: 2026-09-27T01:44:40.061Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-27T02:16:33.553Z · data_change
Index 50 → 50; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Aqi | 154 |
| AqiCategory | Unhealthy |
| StationName | Banking College, Zhengzhou (郑州银行学校) |
| StationUid | 1315 |
| Network | official |
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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