SmogRank / World / North America / Canada / Alberta
Most polluted cities in Alberta, Canada
14 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Edmonton at 7.9 µg/m³, #1,001 in the world.
About 0 people in these 3 cities breathed unhealthy air on an average day over the last 30 days.
Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.
- 1Edmonton 0
- 2Calgary 0
- 3Fort McMurray 0
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Estimated: cities without a monitor
Alberta 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 |
|---|---|
| Spruce Grove | ≈ 4 µg/m³ |
| Chestermere | ≈ 9 µg/m³ |
| Cochrane | ≈ 8 µg/m³ |
| Lloydminster | ≈ 3 µg/m³ |
| Okotoks | ≈ 7 µg/m³ |
| Camrose | ≈ 3 µg/m³ |
| Stony Plain | ≈ 4 µg/m³ |
| Sylvan Lake | ≈ 3 µg/m³ |
| Leduc | ≈ 3 µg/m³ |
Bad-air episodes in Alberta
- North-western United States and Canada, 4 to 22 August 202619 days151 cities204 µg/m³peak, Wenatchee
- North-western United States and Canada, July and August 202616 July to 4 August 2026, 20 days118 cities168 µg/m³peak, Prineville
- Alberta, Canada, June 202629 June 2026, 1 day10 cities55 µg/m³peak, Fort McMurray
- North-western Canada and United States, September 20256 to 13 September 2025, 8 days57 cities103 µg/m³peak, Ephrata
- North-western United States and Canada, August and September 202531 August to 7 September 2025, 8 days94 cities173 µg/m³peak, Squamish
- Western Canada and United States, August 20258 to 10 August 2025, 3 days12 cities117 µg/m³peak, Estevan
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
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SmogRank, most polluted cities in Alberta, Canada, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/ca/region/alberta?w=30d.
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.