Right now
The most recent data we hold from World Air Quality Index arrived 3 hours ago, and this point is in it.
One other detection within 20 km in the last 24 hours, 7 km from here.
Reported by World Air Quality Index today.
No stronger detection stands among the 34 recorded within 20 km of this point since 14 March 2026 — one other scored the same. 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 167 (Unhealthy) at Stribog
The air quality index read 167 (Unhealthy) at the Stribog station.
An estimated 658,811 people live within 5 km of this point.
Nearby, since 14 March 2026
- September 7, 2026 · score 55 · 0.0 km
- September 4, 2026 · score 50 · 3.2 km
- August 3, 2026 · score 35 · 3.9 km
How we know
Confirmed by 2 independent sources, including World Air Quality Index.
Our own score for this event is 55 out of 100, at 70 % 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 | Critical |
| Calamity Score (ours) | 55 / 100 |
| Our confidence | 70% |
| Coordinates | 42.6974, 23.3045 |
| Nearest City | Sofia (1 km) |
| Population Exposed | 658.8K within 5 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-09-12T10:23:39.000Z |
| Source | https://aqicn.org/city/@-1084840 |
Score Breakdown
Technical Details
| Aqi | 167 |
| AqiCategory | Unhealthy |
| StationName | Stribog |
| StationUid | -1084840 |
| Sensor Community Pm25Max | 999.9 |
| Sensor Community Pm25Avg | 999.9 |
| Sensor Community SensorCount | 1 |
| Sensor Community AqiCategory | Hazardous |
| Sensor Community ClusterKey | 42.9_23.4 |
| MergedSources | [{"id":"sensor_community_42.8_23.3","source":"sensor_community","severity":"critical","severityValue":85.0848,"timestamp":1789208410000,"latitude":42.804,"longitude":23.342},{"id":"sensor_community_42.7_23.3","source":"sensor_community","severity":"critical","severityValue":92.6702,"timestamp":1789208300000,"latitude":42.726,"longitude":23.342},{"id":"sensor_community_42.6_23.3","source":"sensor_community","severity":"critical","severityValue":98.998,"timestamp":1789208397000,"latitude":42.642,"longitude":23.31},{"id":"sensor_community_42.9_23.4","source":"sensor_community","severity":"critical","severityValue":98.998,"timestamp":1789208309000,"latitude":42.864,"longitude":23.36}] |
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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