Right now
The most recent data we hold from World Air Quality Index arrived 15 minutes ago, and this point is in it.
3 other detections within 20 km in the last 24 hours, the nearest 11 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 24 April 2026 — one other scored the same. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
World Air Quality Index reported: AQI 159 (Unhealthy) at Jiancaoping, Taiyuan (太原尖草坪)
The air quality index read 159 (Unhealthy) at the Jiancaoping, Taiyuan (太原尖草坪) station.
Urban PEI: 508,612 within a heuristic 5 km radius; not unique people.
This is the lowest air quality index we have recorded at this point, over 5 readings since 25 September 2026 — the previous range was 159 to 167.
Nearby, since 24 April 2026
- September 22, 2026 · score 55 · 0.0 km
- September 20, 2026 · score 46 · 8.6 km
- September 19, 2026 · score 29 · 11.2 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 55 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) | 55 / 100 |
| Legacy data-support index | 0.68/1 |
| Coordinates | 37.8873, 112.5220 |
| Nearest City | Taiyuan (4 km) |
| Urban exposure index (PEI) | 508.6K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-25T21:00:00.000Z |
| Source | https://aqicn.org/city/@1238 |
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: 2026-09-25T21:00:00.000Z.
First archived: 2026-09-25T14:41:24.367Z. Material modification: 2026-09-25T21:50:38.941Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-25T21:50:38.941Z · data_change
Index 55 → 55; severity medium → medium; version 5 → 5.
2026-09-25T20:50:59.778Z · data_change
Index 55 → 55; severity medium → medium; version 5 → 5.
2026-09-25T19:41:41.058Z · data_change
Index 55 → 55; severity medium → medium; version 5 → 5.
2026-09-25T18:42:02.336Z · data_change
Index 55 → 55; severity medium → medium; version 5 → 5.
2026-09-25T17:44:26.595Z · data_change
Index 55 → 55; severity medium → medium; version 5 → 5.
2026-09-25T17:13:38.102Z · data_change
Index 55 → 55; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Aqi | 159 |
| AqiCategory | Unhealthy |
| StationName | Jiancaoping, Taiyuan (太原尖草坪) |
| StationUid | 1238 |
| 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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