SmogRank / Countries / Canada / Quebec
Most polluted cities in Quebec, Canada
12 measured cities, last 24 hours; 0 above the WHO 24-hour guideline. Worst: Shawinigan at 11.3 µg/m³, #317 in the world.
10 good 2 moderate
- 1Shawinigan 11.30.8×
- 2Gatineaulow-cost sensors 9.20.6×
- 3Québec 9.00.6×
- 4L'Ancienne-Lorette 8.70.6×
- 5Saint-Georges 7.80.5×
- 6Trois-Rivières 6.80.5×
- 7Montréal 5.80.4×
- 8Sept-Îles 5.80.4×
- 9Drummondville 5.60.4×
- 10Granby 5.00.3×
- 11Rouyn-Noranda 4.80.3×
- 12Sherbrooke 4.50.3×
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 20:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.