SmogRank / Episodes / Canada

Alberta, Saskatchewan and Manitoba, Canada, 22 to 23 August 2024

For 2 days, from 22 to 23 August 2024, 11 cities in Canada had PM2.5 at least twice their usual for the time of year. The worst reading was Flin Flon, Manitoba, Canada: 72.0 µg/m³ on 22 August, about 3.2× its usual 22.3. Ended 23 August.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached11in 1 country
Days222 to 23 August 2024
Worst day22 August10 cities counted
Furthest above usual5.5×Prince Albert

Day by day

22 August 10 cities at twice their usual or more
Swift CurrentAirdrieCalgaryRed DeerGrand CentreFlin FlonDrayton ValleySt. AlbertEdmontonFort SaskatchewanSherwood ParkSaskatoonReginaPrince Albert
19 Aug20212223242526
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

Flin FlonFlin Flon, 19 August: 19.7 µg/m³Flin Flon, 20 August: 12.5 µg/m³Flin Flon, 21 August: 19.0 µg/m³Flin Flon, 22 August: 72.0 µg/m³, 3.2× its usual 22.3Flin Flon, 23 August: 62.8 µg/m³, 3.0× its usual 21.2Flin Flon, 24 August: 23.6 µg/m³Flin Flon, 25 August: 5.6 µg/m³Flin Flon, 26 August: 58.5 µg/m³Prince AlbertPrince Albert, 19 August: no readingPrince Albert, 20 August: 17.6 µg/m³Prince Albert, 21 August: 13.9 µg/m³Prince Albert, 22 August: 67.3 µg/m³, 5.5× its usual 12.2Prince Albert, 23 August: 48.4 µg/m³, 3.9× its usual 12.3Prince Albert, 24 August: no readingPrince Albert, 25 August: no readingPrince Albert, 26 August: no readingEdmontonEdmonton, 19 August: 24.7 µg/m³Edmonton, 20 August: 12.8 µg/m³Edmonton, 21 August: 15.5 µg/m³Edmonton, 22 August: 51.6 µg/m³, 3.9× its usual 13.2Edmonton, 23 August: 23.0 µg/m³Edmonton, 24 August: 19.0 µg/m³Edmonton, 25 August: 7.4 µg/m³Edmonton, 26 August: 8.4 µg/m³Fort SaskatchewanFort Saskatchewan, 19 August: 24.1 µg/m³Fort Saskatchewan, 20 August: 11.6 µg/m³Fort Saskatchewan, 21 August: 12.5 µg/m³Fort Saskatchewan, 22 August: 47.7 µg/m³, 4.1× its usual 11.6Fort Saskatchewan, 23 August: 22.8 µg/m³Fort Saskatchewan, 24 August: 19.2 µg/m³Fort Saskatchewan, 25 August: 5.4 µg/m³Fort Saskatchewan, 26 August: 7.8 µg/m³SaskatoonSaskatoon, 19 August: 24.3 µg/m³Saskatoon, 20 August: 11.4 µg/m³Saskatoon, 21 August: 11.4 µg/m³Saskatoon, 22 August: 43.6 µg/m³, 3.5× its usual 12.6Saskatoon, 23 August: 60.2 µg/m³, 4.8× its usual 12.6Saskatoon, 24 August: 16.9 µg/m³Saskatoon, 25 August: 5.3 µg/m³Saskatoon, 26 August: 7.6 µg/m³Sherwood ParkSherwood Park, 19 August: no readingSherwood Park, 20 August: 9.6 µg/m³Sherwood Park, 21 August: 11.5 µg/m³Sherwood Park, 22 August: 39.7 µg/m³, 4.6× its usual 8.7Sherwood Park, 23 August: 13.8 µg/m³Sherwood Park, 24 August: 12.5 µg/m³Sherwood Park, 25 August: 6.2 µg/m³Sherwood Park, 26 August: 6.4 µg/m³Grand CentreGrand Centre, 19 August: 24.5 µg/m³Grand Centre, 20 August: 6.1 µg/m³Grand Centre, 21 August: 16.2 µg/m³Grand Centre, 22 August: 34.8 µg/m³, 3.2× its usual 11.0Grand Centre, 23 August: 24.5 µg/m³Grand Centre, 24 August: 23.3 µg/m³Grand Centre, 25 August: 5.5 µg/m³Grand Centre, 26 August: 8.5 µg/m³St. AlbertSt. Albert, 19 August: 18.2 µg/m³St. Albert, 20 August: 8.6 µg/m³St. Albert, 21 August: 13.0 µg/m³St. Albert, 22 August: 34.3 µg/m³, 3.6× its usual 9.5St. Albert, 23 August: 16.0 µg/m³St. Albert, 24 August: 15.0 µg/m³St. Albert, 25 August: 3.8 µg/m³St. Albert, 26 August: 6.6 µg/m³Drayton ValleyDrayton Valley, 19 August: 36.9 µg/m³Drayton Valley, 20 August: 12.0 µg/m³Drayton Valley, 21 August: 13.8 µg/m³Drayton Valley, 22 August: 31.5 µg/m³, 3.5× its usual 9.0Drayton Valley, 23 August: 22.6 µg/m³Drayton Valley, 24 August: 15.5 µg/m³Drayton Valley, 25 August: 7.4 µg/m³Drayton Valley, 26 August: 7.1 µg/m³Red DeerRed Deer, 19 August: 13.9 µg/m³Red Deer, 20 August: 4.8 µg/m³Red Deer, 21 August: 8.7 µg/m³Red Deer, 22 August: 30.3 µg/m³, 2.6× its usual 11.8Red Deer, 23 August: 11.4 µg/m³Red Deer, 24 August: 8.1 µg/m³Red Deer, 25 August: 5.4 µg/m³Red Deer, 26 August: 14.2 µg/m³ReginaRegina, 19 August: 12.5 µg/m³Regina, 20 August: 10.7 µg/m³Regina, 21 August: 11.4 µg/m³Regina, 22 August: 17.1 µg/m³Regina, 23 August: 60.1 µg/m³, 5.1× its usual 11.7Regina, 24 August: 10.2 µg/m³Regina, 25 August: 8.2 µg/m³Regina, 26 August: 5.5 µg/m³19 Aug20212223242526
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
Prince AlbertSaskatchewan, Canada2 67.322 August12.25.5×
ReginaSaskatchewan, Canada1 60.123 August11.75.1×
SaskatoonSaskatchewan, Canada2 60.223 August12.64.8×
Sherwood ParkAlberta, Canada1 39.722 August8.74.6×
Fort SaskatchewanAlberta, Canada1 47.722 August11.64.1×
EdmontonAlberta, Canada1 51.622 August13.23.9×
St. AlbertAlberta, Canada1 34.322 August9.53.6×
Drayton ValleyAlberta, Canada1 31.522 August9.03.5×
Flin FlonManitoba, Canada2 72.022 August22.33.2×
Grand CentreAlberta, Canada1 34.822 August11.03.2×
Red DeerAlberta, Canada1 30.322 August11.82.6×

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 33 of 43 episodes in Canada since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 43.

Use this page

SmogRank, Alberta, Saskatchewan and Manitoba, Canada, 22 to 23 August 2024: 11 cities with PM2.5 at twice their usual or more, 22 to 23 August 2024, smogrank.com/episodes/2024-08-22-alberta-saskatchewan-and-manitoba-canada (accessed 5 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.