SmogRank / Countries / Canada / Quebec
Most polluted cities in Quebec, Canada
0 measured cities ranked by PM2.5, last 24 hours.
No city has enough measurements for this window yet.
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data
Estimated: cities without a monitor
Quebec cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Laval estimated | ≈ 7 µg/m³ |
| Longueuil estimated | ≈ 7 µg/m³ |
| Rosemont–La Petite-Patrie estimated | ≈ 7 µg/m³ |
| Villeray–Saint-Michel–Parc-Extension estimated | ≈ 7 µg/m³ |
| Lévis estimated | ≈ 8 µg/m³ |
| Mercier–Hochelaga-Maisonneuve estimated | ≈ 7 µg/m³ |
| Saint-Louis-de-Terrebonne estimated | ≈ 7 µg/m³ |
| Terrebonne estimated | ≈ 7 µg/m³ |
| Le Plateau-Mont-Royal estimated | ≈ 7 µg/m³ |
| Ville-Marie estimated | ≈ 7 µg/m³ |
| Montréal-Nord estimated | ≈ 7 µg/m³ |
| Le Sud-Ouest estimated | ≈ 7 µg/m³ |
| Repentigny estimated | ≈ 7 µg/m³ |
| Pierrefonds-Roxboro estimated | ≈ 5 µg/m³ |
| Pierrefonds estimated | ≈ 5 µg/m³ |
| Aylmer estimated | ≈ 5 µg/m³ |
| Saint-Michel estimated | ≈ 7 µg/m³ |
| Saint-Jérôme estimated | ≈ 5 µg/m³ |
| Saint-Hyacinthe estimated | ≈ 5 µg/m³ |
| Dollard-Des Ormeaux estimated | ≈ 5 µg/m³ |
| Blainville estimated | ≈ 5 µg/m³ |
| Salaberry-de-Valleyfield estimated | ≈ 5 µg/m³ |
| Châteauguay estimated | ≈ 6 µg/m³ |
| Rimouski estimated | ≈ 5 µg/m³ |
| Saint-Eustache estimated | ≈ 5 µg/m³ |
| Val-des-Arbres estimated | ≈ 7 µg/m³ |
| Boucherville estimated | ≈ 7 µg/m³ |
| Neufchâtel-Est–Lebourgneuf estimated | ≈ 8 µg/m³ |
| Laval-des-Rapides estimated | ≈ 7 µg/m³ |
| Joliette estimated | ≈ 4 µg/m³ |
| Cartierville estimated | ≈ 7 µg/m³ |
| Mascouche estimated | ≈ 7 µg/m³ |
| Mirabel estimated | ≈ 5 µg/m³ |
| Victoriaville estimated | ≈ 4 µg/m³ |
| Côte-Saint-Luc estimated | ≈ 7 µg/m³ |
| Pointe-Claire estimated | ≈ 5 µg/m³ |
| Alma estimated | ≈ 4 µg/m³ |
| Sainte-Julie estimated | ≈ 7 µg/m³ |
| Saint-Constant estimated | ≈ 6 µg/m³ |
| Boisbriand estimated | ≈ 5 µg/m³ |
Updated 2026-10-01 16:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.