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 <1 km from here.
Reported by World Air Quality Index yesterday.
It is the 5th strongest of the 61 detections recorded within 20 km of this point since 30 March 2026. The last comparable one was on 5 September 2026.
What the source measured
World Air Quality Index reported: AQI 255 (Very Unhealthy) at Rue Paul-dutil
The air quality index read 255 (Very Unhealthy) at the Rue Paul-dutil station.
An estimated 14,708 people live within 5 km of this point.
Nearby, since 30 March 2026
- September 7, 2026 · score 41 · 0.0 km
- July 8, 2026 · score 26 · 0.0 km
- August 31, 2026 · score 19 · 6.8 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 48 out of 100, at 66 % 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) | 48 / 100 |
| Our confidence | 66% |
| Coordinates | 46.7834, -71.3550 |
| Nearest City | L'Ancienne-Lorette (1 km) |
| Population Exposed | 14.7K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-06T11:29:56.000Z |
| Source | https://aqicn.org/city/@-1438279 |
Score Breakdown
Technical Details
| Aqi | 255 |
| AqiCategory | Very Unhealthy |
| StationName | Rue Paul-dutil |
| StationUid | -1438279 |
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 L'Ancienne-Lorette?
Calamity.live data shows a air quality event with CalamityScore 48/100, near L'Ancienne-Lorette (Canada), based on data from waqi. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.