Right now
The most recent data we hold from World Air Quality Index arrived 45 minutes ago, and this point is in it.
2 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by World Air Quality Index today.
No stronger detection stands among the 9 recorded within 20 km of this point since 23 April 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
World Air Quality Index reported: AQI 159 (Unhealthy) at City committee communist party school, Hengyang (衡阳市委党校)
The air quality index read 159 (Unhealthy) at the City committee communist party school, Hengyang (衡阳市委党校) station.
Urban PEI: 497,692 within a heuristic 5 km radius; not unique people.
Nearby, since 23 April 2026
- September 25, 2026 · score 50 · 0.0 km
- September 14, 2026 · score 50 · 0.0 km
- September 7, 2026 · 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.
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 | 26.8733, 112.6197 |
| Nearest City | Hengyang (2 km) |
| Urban exposure index (PEI) | 497.7K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-26T15:00:00.000Z |
| Source | https://aqicn.org/city/@7820 |
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: 2026-09-26T15:00:00.000Z.
First archived: 2026-09-26T15:38:31.930Z. 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 | 159 |
| AqiCategory | Unhealthy |
| StationName | City committee communist party school, Hengyang (衡阳市委党校) |
| StationUid | 7820 |
| 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.
Review the area, threshold and delivery channel in your account.
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