Right now
The most recent data we hold from World Air Quality Index arrived 4 minutes 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, 2 km from here.
Reported by World Air Quality Index today.
It is one of only 4 we have recorded within 20 km of this point since 12 May 2026. The last comparable one was on 13 September 2026. One more was recorded here in the fortnight before it.
What the source measured
World Air Quality Index reported: AQI 151 (Unhealthy) at Yongding District, Zhangjiajie (张家界永定新区)
The air quality index read 151 (Unhealthy) at the Yongding District, Zhangjiajie (张家界永定新区) station.
Urban PEI: 274,971 within a heuristic 5 km radius; not unique people.
Nearby, since 12 May 2026
- September 13, 2026 · score 50 · 1.9 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.65/1 |
| Coordinates | 29.1389, 110.4800 |
| Nearest City | Zhangjiajie (1 km) |
| Urban exposure index (PEI) | 275.0K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-14T02:00:00.000Z |
| Source | https://aqicn.org/city/@4453 |
Physical priority index · v4 (historical). 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: 2026-09-14T02:00:00.000Z.
First archived: 2026-09-14T03:01:49.773Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Aqi | 151 |
| AqiCategory | Unhealthy |
| StationName | Yongding District, Zhangjiajie (张家界永定新区) |
| StationUid | 4453 |
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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