SmogRank / World / Canada / Alberta / May 2023
Most polluted cities in Alberta, Canada, May 2023
13 cities in Alberta, Canada ranked by their average PM2.5 over the 31 days. Worst: Grande Prairie at 85.3 µg/m³, #1 of 1,543 cities in the world. Cleanest: Medicine Hat at 13.7. 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 48%
- 2Fort McMurray 39%
- 3Edson 29%
- 4Fort Saskatchewan 26%
- 5Grand Centre 20%
- 6Edmonton 19%
- 7St. Albert 19%
- 8Airdrie 19%
- 9Calgary 19%
- 10Sherwood Park 17%
- 11Red Deer 16%
- 12Lethbridge 10%
- 13Medicine Hat 10%
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
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SmogRank, most polluted cities in Alberta, Canada, PM2.5, May 2023, smogrank.com/ca/region/alberta/history/2023-05 (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.