SmogRank / Episodes / Canada

Alberta and Saskatchewan, Canada, August 2024

For 4 days, from 14 to 17 August 2024, 11 cities in Canada had PM2.5 at least twice their usual for the time of year. The worst reading was Edmonton, Alberta, Canada: 152.0 µg/m³ on 14 August, about 13× its usual 12.1.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached11in 1 country
Days414 to 17 August 2024
Worst day15 August11 cities counted
Furthest above usual15×Swift Current

Day by day

15 August 11 cities at twice their usual or more
Prince AlbertCranbrookLethbridgeCalgaryReginaSherwood ParkAirdrieRed DeerSaskatoonMedicine HatSt. AlbertEdmontonSwift Current
11 Aug121314151617181920
Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.

How it spread

EdmontonEdmonton, 11 August: 17.4 µg/m³Edmonton, 12 August: 13.2 µg/m³Edmonton, 13 August: 13.6 µg/m³Edmonton, 14 August: 152.0 µg/m³, 13× its usual 12.1Edmonton, 15 August: 104.4 µg/m³, 8.8× its usual 11.8Edmonton, 16 August: 31.9 µg/m³, 2.7× its usual 11.9Edmonton, 17 August: 41.8 µg/m³, 3.5× its usual 11.9Edmonton, 18 August: 39.3 µg/m³Edmonton, 19 August: 24.7 µg/m³Edmonton, 20 August: 12.8 µg/m³St. AlbertSt. Albert, 11 August: 12.7 µg/m³St. Albert, 12 August: 10.0 µg/m³St. Albert, 13 August: 9.8 µg/m³St. Albert, 14 August: 102.0 µg/m³, 12× its usual 8.2St. Albert, 15 August: 68.0 µg/m³, 8.3× its usual 8.2St. Albert, 16 August: 19.5 µg/m³St. Albert, 17 August: 26.7 µg/m³, 3.3× its usual 8.2St. Albert, 18 August: 20.7 µg/m³St. Albert, 19 August: 18.2 µg/m³St. Albert, 20 August: 8.6 µg/m³AirdrieAirdrie, 11 August: no readingAirdrie, 12 August: no readingAirdrie, 13 August: 14.9 µg/m³Airdrie, 14 August: 38.3 µg/m³, 4.0× its usual 9.5Airdrie, 15 August: 65.1 µg/m³, 7.1× its usual 9.2Airdrie, 16 August: no readingAirdrie, 17 August: 22.5 µg/m³Airdrie, 18 August: 15.2 µg/m³Airdrie, 19 August: 9.9 µg/m³Airdrie, 20 August: 5.8 µg/m³CalgaryCalgary, 11 August: 14.1 µg/m³Calgary, 12 August: 13.4 µg/m³Calgary, 13 August: 16.1 µg/m³Calgary, 14 August: 34.1 µg/m³, 2.7× its usual 12.5Calgary, 15 August: 57.4 µg/m³, 4.6× its usual 12.5Calgary, 16 August: 39.3 µg/m³, 3.1× its usual 12.5Calgary, 17 August: 28.6 µg/m³, 2.3× its usual 12.5Calgary, 18 August: 17.3 µg/m³Calgary, 19 August: 11.9 µg/m³Calgary, 20 August: 7.8 µg/m³Medicine HatMedicine Hat, 11 August: 11.7 µg/m³Medicine Hat, 12 August: 12.7 µg/m³Medicine Hat, 13 August: 14.0 µg/m³Medicine Hat, 14 August: 29.9 µg/m³, 3.4× its usual 8.8Medicine Hat, 15 August: 78.3 µg/m³, 8.9× its usual 8.8Medicine Hat, 16 August: 35.2 µg/m³, 4.0× its usual 8.7Medicine Hat, 17 August: 11.5 µg/m³Medicine Hat, 18 August: 10.1 µg/m³Medicine Hat, 19 August: 8.7 µg/m³Medicine Hat, 20 August: 6.1 µg/m³Swift CurrentSwift Current, 11 August: 13.5 µg/m³Swift Current, 12 August: 9.9 µg/m³Swift Current, 13 August: 11.9 µg/m³Swift Current, 14 August: 16.3 µg/m³Swift Current, 15 August: 137.0 µg/m³, 15× its usual 9.3Swift Current, 16 August: 64.9 µg/m³, 7.3× its usual 8.9Swift Current, 17 August: 19.8 µg/m³Swift Current, 18 August: 10.2 µg/m³Swift Current, 19 August: 10.2 µg/m³Swift Current, 20 August: 7.8 µg/m³SaskatoonSaskatoon, 11 August: no readingSaskatoon, 12 August: 14.0 µg/m³Saskatoon, 13 August: 14.1 µg/m³Saskatoon, 14 August: 29.0 µg/m³Saskatoon, 15 August: 99.0 µg/m³, 8.1× its usual 12.2Saskatoon, 16 August: 40.8 µg/m³, 3.6× its usual 11.3Saskatoon, 17 August: 41.3 µg/m³Saskatoon, 18 August: 32.4 µg/m³Saskatoon, 19 August: 24.3 µg/m³Saskatoon, 20 August: 11.4 µg/m³Red DeerRed Deer, 11 August: 11.9 µg/m³Red Deer, 12 August: 13.9 µg/m³Red Deer, 13 August: 15.1 µg/m³Red Deer, 14 August: 22.3 µg/m³Red Deer, 15 August: 77.6 µg/m³, 7.5× its usual 10.4Red Deer, 16 August: 28.6 µg/m³, 2.8× its usual 10.4Red Deer, 17 August: 25.8 µg/m³, 2.4× its usual 10.6Red Deer, 18 August: 21.9 µg/m³Red Deer, 19 August: 13.9 µg/m³Red Deer, 20 August: 4.8 µg/m³ReginaRegina, 11 August: 13.8 µg/m³Regina, 12 August: 16.2 µg/m³Regina, 13 August: 9.9 µg/m³Regina, 14 August: 12.7 µg/m³Regina, 15 August: 61.0 µg/m³, 5.5× its usual 11.0Regina, 16 August: 59.8 µg/m³, 5.5× its usual 10.9Regina, 17 August: 52.2 µg/m³Regina, 18 August: 31.5 µg/m³Regina, 19 August: 12.5 µg/m³Regina, 20 August: 10.7 µg/m³Sherwood ParkSherwood Park, 11 August: 11.8 µg/m³Sherwood Park, 12 August: 9.2 µg/m³Sherwood Park, 13 August: no readingSherwood Park, 14 August: no readingSherwood Park, 15 August: 54.6 µg/m³, 6.7× its usual 8.1Sherwood Park, 16 August: 18.6 µg/m³Sherwood Park, 17 August: 26.6 µg/m³, 3.3× its usual 8.1Sherwood Park, 18 August: 27.1 µg/m³Sherwood Park, 19 August: no readingSherwood Park, 20 August: 9.6 µg/m³LethbridgeLethbridge, 11 August: 8.3 µg/m³Lethbridge, 12 August: 10.8 µg/m³Lethbridge, 13 August: 9.9 µg/m³Lethbridge, 14 August: 14.8 µg/m³Lethbridge, 15 August: 38.2 µg/m³, 4.0× its usual 9.5Lethbridge, 16 August: 23.3 µg/m³Lethbridge, 17 August: 5.3 µg/m³Lethbridge, 18 August: 8.8 µg/m³Lethbridge, 19 August: 6.5 µg/m³Lethbridge, 20 August: 3.5 µg/m³11 Aug121314151617181920
Every counted city, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
Swift CurrentSaskatchewan, Canada2 137.015 August9.315×
EdmontonAlberta, Canada4 152.014 August12.113×
St. AlbertAlberta, Canada3 102.014 August8.212×
Medicine HatAlberta, Canada3 78.315 August8.88.9×
SaskatoonSaskatchewan, Canada2 99.015 August12.28.1×
Red DeerAlberta, Canada3 77.615 August10.47.5×
AirdrieAlberta, Canada2 65.115 August9.27.1×
Sherwood ParkAlberta, Canada2 54.615 August8.16.7×
ReginaSaskatchewan, Canada2 61.015 August11.05.5×
CalgaryAlberta, Canada4 57.415 August12.54.6×
LethbridgeAlberta, Canada1 38.215 August9.54.0×

Daily means in µg/m³, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.

Against other episodes in Canada

Number 17 of 24 episodes in Canada since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 24.

Use this page

SmogRank, Alberta and Saskatchewan, Canada, August 2024: 11 cities with PM2.5 at twice their usual or more, 14 to 17 August 2024, smogrank.com/episodes/2024-08-alberta-and-saskatchewan-canada (accessed 4 October 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes. Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.