SmogRank / Countries / Canada / Quebec
Most polluted cities in Quebec, Canada
17 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Sorel-Tracy at 6.1 µg/m³, #1,237 in the world.
17 good
- 1Sorel-Tracy 6.1
- 2L'Ancienne-Lorette 6.0
- 3Shawinigan 5.4
- 4Brossard 5.3
- 5Montréal 5.3
- 6Saint-Jean-sur-Richelieu 5.2
- 7Rivière-des-Prairies–Pointe-aux-Trembles 5.2
- 8Saint-Georges 5.1
- 9Trois-Rivières 5.0
- 10Québec 5.0
- 11Granby 4.9
- 12Drummondville 4.6
- 13Saguenay 4.2
- 14Sherbrooke 4.2
- 15Rouyn-Noranda 4.0
- 16Sept-Îles 3.8
- 17Gatineaulow-cost sensors 2.6
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+
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 | ≈ 7 µg/m³ |
| Longueuil | ≈ 7 µg/m³ |
| Rosemont–La Petite-Patrie | ≈ 7 µg/m³ |
| Villeray–Saint-Michel–Parc-Extension | ≈ 7 µg/m³ |
| Lévis | ≈ 8 µg/m³ |
| Mercier–Hochelaga-Maisonneuve | ≈ 7 µg/m³ |
| Saint-Louis-de-Terrebonne | ≈ 7 µg/m³ |
| Terrebonne | ≈ 7 µg/m³ |
| Le Plateau-Mont-Royal | ≈ 7 µg/m³ |
| Ville-Marie | ≈ 7 µg/m³ |
| Montréal-Nord | ≈ 7 µg/m³ |
| Le Sud-Ouest | ≈ 7 µg/m³ |
| Repentigny | ≈ 7 µg/m³ |
| Pierrefonds-Roxboro | ≈ 5 µg/m³ |
| Pierrefonds | ≈ 5 µg/m³ |
| Aylmer | ≈ 5 µg/m³ |
| Saint-Michel | ≈ 7 µg/m³ |
| Saint-Jérôme | ≈ 5 µg/m³ |
| Saint-Hyacinthe | ≈ 5 µg/m³ |
| Dollard-Des Ormeaux | ≈ 5 µg/m³ |
| Blainville | ≈ 5 µg/m³ |
| Salaberry-de-Valleyfield | ≈ 5 µg/m³ |
| Châteauguay | ≈ 6 µg/m³ |
| Rimouski | ≈ 5 µg/m³ |
| Saint-Eustache | ≈ 5 µg/m³ |
| Val-des-Arbres | ≈ 7 µg/m³ |
| Boucherville | ≈ 7 µg/m³ |
| Neufchâtel-Est–Lebourgneuf | ≈ 8 µg/m³ |
| Laval-des-Rapides | ≈ 7 µg/m³ |
| Joliette | ≈ 4 µg/m³ |
| Cartierville | ≈ 7 µg/m³ |
| Mascouche | ≈ 7 µg/m³ |
| Mirabel | ≈ 5 µg/m³ |
| Victoriaville | ≈ 4 µg/m³ |
| Côte-Saint-Luc | ≈ 7 µg/m³ |
| Pointe-Claire | ≈ 5 µg/m³ |
| Alma | ≈ 4 µg/m³ |
| Sainte-Julie | ≈ 7 µg/m³ |
| Saint-Constant | ≈ 6 µg/m³ |
| Boisbriand | ≈ 5 µg/m³ |
Updated 2026-10-01 23:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.