SmogRank / World / Canada / Alberta / September 2025
Most polluted cities in Alberta, Canada, September 2025
13 cities in Alberta, Canada ranked by their average PM2.5 over the 30 days. Worst: Fort McMurray at 26.1 µg/m³, #126 of 3,052 cities in the world. Cleanest: Medicine Hat at 14.2. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Grande Prairie 30%
- 2Edmonton 27%
- 3Fort McMurray 20%
- 4Edson 20%
- 5Fort Saskatchewan 19%
- 6Calgary 13%
- 7St. Albert 13%
- 8Sherwood Park 13%
- 9Red Deer 13%
- 10Lethbridge 13%
- 11Drayton Valley 7%
- 12Grand Centre 7%
- 13Medicine Hat 3%
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
All cities in the world, September 2025 · All cities in Canada, September 2025 · Alberta now
Use this board
SmogRank, most polluted cities in Alberta, Canada, PM2.5, September 2025, smogrank.com/ca/region/alberta/history/2025-09 (accessed 6 Oct 2026).
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.