Right now
The most recent data we hold from World Air Quality Index arrived 4 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 9 km from here.
Reported by World Air Quality Index today.
It is the 2nd strongest of the 59 detections recorded within 20 km of this point since 30 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
World Air Quality Index reported: AQI 270 (Very Unhealthy) at Rouyn-Noranda - secteur du centre-ville, Quebec, Canada
The air quality index read 270 (Very Unhealthy) at the Rouyn-Noranda - secteur du centre-ville, Quebec, Canada station.
An estimated 223,421 people live within 5 km of this point.
Nearby, since 30 March 2026
- September 5, 2026 · score 64 · 0.0 km
- September 4, 2026 · score 50 · 0.0 km
- August 2, 2026 · score 35 · 2.0 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 57 out of 100, at 60 % 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 | High |
| Calamity Score (ours) | 57 / 100 |
| Our confidence | 60% |
| Coordinates | 46.8033, -71.2428 |
| Nearest City | Québec (3 km) |
| Population Exposed | 223.4K within 5 km |
| Impact Tier | severe |
| Timestamp | 2026-09-06T14:00:00.000Z |
| Source | https://aqicn.org/city/@5437 |
Score Breakdown
Technical Details
| Aqi | 270 |
| AqiCategory | Very Unhealthy |
| StationName | Rouyn-Noranda - secteur du centre-ville, Quebec, Canada |
| StationUid | 5437 |
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.
Want to know when something happens near Québec?
Calamity.live data shows a air quality event with CalamityScore 57/100, near Québec (Canada), based on data from waqi. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.