SmogRank / Episodes / Canada

Alberta, Saskatchewan and Manitoba, Canada, July 2024

For 4 days, from 7 to 10 July 2024, 9 cities in Canada had PM2.5 at least twice their usual for the time of year. The worst reading was Grand Centre, Alberta, Canada: 83.7 µg/m³ on 7 July, about 9.3× its usual 9.0. Ended 10 July.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached9in 1 country
Days47 to 10 July 2024
Worst day7 July6 cities counted
Furthest above usual9.3×Grand Centre

Day by day

7 July 6 cities at twice their usual or more
Swift CurrentMedicine HatHavreSherwood ParkSt. AlbertLethbridgeRed DeerAirdrieCalgaryEdmontonFlin FlonFort SaskatchewanSaskatoonEstevanPrince AlbertFort McMurrayReginaGrand Centre
4 Jul5678910111213
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

Grand CentreGrand Centre, 4 July: 23.2 µg/m³Grand Centre, 5 July: 6.7 µg/m³Grand Centre, 6 July: 33.1 µg/m³Grand Centre, 7 July: 83.7 µg/m³, 9.3× its usual 9.0Grand Centre, 8 July: 38.7 µg/m³, 4.3× its usual 9.1Grand Centre, 9 July: 22.2 µg/m³Grand Centre, 10 July: 25.3 µg/m³, 2.7× its usual 9.5Grand Centre, 11 July: 22.7 µg/m³Grand Centre, 12 July: 4.1 µg/m³Grand Centre, 13 July: 7.3 µg/m³Fort McMurrayFort McMurray, 4 July: 19.3 µg/m³Fort McMurray, 5 July: 18.8 µg/m³Fort McMurray, 6 July: 68.7 µg/m³Fort McMurray, 7 July: 54.7 µg/m³, 4.9× its usual 11.2Fort McMurray, 8 July: 60.3 µg/m³, 5.4× its usual 11.2Fort McMurray, 9 July: 91.8 µg/m³Fort McMurray, 10 July: 77.6 µg/m³, 6.9× its usual 11.2Fort McMurray, 11 July: 52.8 µg/m³Fort McMurray, 12 July: no readingFort McMurray, 13 July: 57.2 µg/m³ReginaRegina, 4 July: 13.3 µg/m³Regina, 5 July: 14.9 µg/m³Regina, 6 July: 5.5 µg/m³Regina, 7 July: 40.7 µg/m³, 5.2× its usual 7.9Regina, 8 July: 68.7 µg/m³, 8.7× its usual 7.9Regina, 9 July: 28.8 µg/m³, 3.5× its usual 8.3Regina, 10 July: 23.4 µg/m³Regina, 11 July: 12.8 µg/m³Regina, 12 July: 12.3 µg/m³Regina, 13 July: 11.3 µg/m³Prince AlbertPrince Albert, 4 July: 26.0 µg/m³Prince Albert, 5 July: 19.9 µg/m³Prince Albert, 6 July: 13.0 µg/m³Prince Albert, 7 July: 27.3 µg/m³, 2.4× its usual 11.2Prince Albert, 8 July: 49.5 µg/m³, 4.5× its usual 11.0Prince Albert, 9 July: 43.2 µg/m³, 3.9× its usual 11.0Prince Albert, 10 July: 58.7 µg/m³, 5.4× its usual 10.8Prince Albert, 11 July: 28.5 µg/m³Prince Albert, 12 July: 32.4 µg/m³Prince Albert, 13 July: 8.8 µg/m³Fort SaskatchewanFort Saskatchewan, 4 July: 7.7 µg/m³Fort Saskatchewan, 5 July: 7.1 µg/m³Fort Saskatchewan, 6 July: 15.0 µg/m³Fort Saskatchewan, 7 July: 26.1 µg/m³, 2.7× its usual 9.5Fort Saskatchewan, 8 July: 11.9 µg/m³Fort Saskatchewan, 9 July: 11.9 µg/m³Fort Saskatchewan, 10 July: 16.1 µg/m³Fort Saskatchewan, 11 July: 10.7 µg/m³Fort Saskatchewan, 12 July: 4.9 µg/m³Fort Saskatchewan, 13 July: 6.4 µg/m³EdmontonEdmonton, 4 July: 7.9 µg/m³Edmonton, 5 July: 6.9 µg/m³Edmonton, 6 July: 13.8 µg/m³Edmonton, 7 July: 25.9 µg/m³, 2.1× its usual 12.1Edmonton, 8 July: 10.7 µg/m³Edmonton, 9 July: 15.3 µg/m³Edmonton, 10 July: 18.8 µg/m³Edmonton, 11 July: 12.1 µg/m³Edmonton, 12 July: 4.1 µg/m³Edmonton, 13 July: 7.7 µg/m³EstevanEstevan, 4 July: 10.4 µg/m³Estevan, 5 July: 15.2 µg/m³Estevan, 6 July: 8.9 µg/m³Estevan, 7 July: 13.6 µg/m³Estevan, 8 July: 56.0 µg/m³, 5.4× its usual 10.3Estevan, 9 July: 38.5 µg/m³, 3.7× its usual 10.3Estevan, 10 July: 28.3 µg/m³Estevan, 11 July: 22.2 µg/m³Estevan, 12 July: 20.0 µg/m³Estevan, 13 July: 11.8 µg/m³SaskatoonSaskatoon, 4 July: 18.3 µg/m³Saskatoon, 5 July: 13.0 µg/m³Saskatoon, 6 July: 9.0 µg/m³Saskatoon, 7 July: 22.8 µg/m³Saskatoon, 8 July: 47.0 µg/m³, 4.9× its usual 9.6Saskatoon, 9 July: 41.3 µg/m³, 4.3× its usual 9.6Saskatoon, 10 July: 38.9 µg/m³, 4.0× its usual 9.8Saskatoon, 11 July: 18.3 µg/m³Saskatoon, 12 July: 21.5 µg/m³Saskatoon, 13 July: no readingFlin FlonFlin Flon, 4 July: 7.8 µg/m³Flin Flon, 5 July: 16.8 µg/m³Flin Flon, 6 July: 18.8 µg/m³Flin Flon, 7 July: 10.2 µg/m³Flin Flon, 8 July: 14.3 µg/m³Flin Flon, 9 July: 29.4 µg/m³, 2.1× its usual 13.8Flin Flon, 10 July: 33.3 µg/m³, 2.3× its usual 14.5Flin Flon, 11 July: 48.0 µg/m³Flin Flon, 12 July: 14.2 µg/m³Flin Flon, 13 July: 9.6 µg/m³4 Jul5678910111213
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
Grand CentreAlberta, Canada3 83.77 July9.09.3×
ReginaSaskatchewan, Canada3 68.78 July7.98.7×
Fort McMurrayAlberta, Canada3 77.610 July11.26.9×
Prince AlbertSaskatchewan, Canada4 58.710 July10.85.4×
EstevanSaskatchewan, Canada2 56.08 July10.35.4×
SaskatoonSaskatchewan, Canada3 47.08 July9.64.9×
Fort SaskatchewanAlberta, Canada1 26.17 July9.52.7×
Flin FlonManitoba, Canada2 33.310 July14.52.3×
EdmontonAlberta, Canada1 25.97 July12.12.1×

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 40 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, July 2024: 9 cities with PM2.5 at twice their usual or more, 7 to 10 July 2024, smogrank.com/episodes/2024-07-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.