SmogRank / Canada / Alberta / Grand Centre
Grand Centre, month by month
Grand Centre has a measured daily mean on 1,306 days since 1 January 2023. Its worst month was July 2024, at 119 US AQI (42.8 µg/m³), 38th of 2,566 cities on that month's world ranking. Its cleanest was April 2024, at 19 US AQI (3.4 µg/m³). 2025 averaged 53 US AQI (10.3 µg/m³), against 54 US AQI (10.7 µg/m³) in 2024.
Every month since 2023
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
Months without a mean, and why
2 months
| Month | Why |
|---|---|
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 2 of 28 days measured; a month needs 20. The others: 1 with readings for part of the day (a day needs 18 hours), 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Grand Centre's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2024 | 11942.8 µg/m³ | 38thof 2,566 | North-western United States and Canada, July 2024 Alberta, Saskatchewan and Manitoba, Canada, July 2024 |
| September 2023 | 11440.7 µg/m³ | 16thof 2,176 | Alberta, Saskatchewan and British Columbia, Canada, September 2023 Alberta, British Columbia and Saskatchewan, Canada, September 2023and 2 more |
| May 2023 | 10135.5 µg/m³ | 43rdof 1,600 | North-western United States and Canada, May 2023 North-western Canada and United States, May 2023and 1 more |
| August 2023 | 7923.9 µg/m³ | 85thof 1,980 | Northern United States and Canada, August and September 2023 North-western United States and Canada, August 2023 |
| July 2023 | 7622.6 µg/m³ | 66thof 1,432 | Alberta and Saskatchewan, Canada, July 2023 United States and Canada, July 2023and 1 more |
| June 2025 | 7622.6 µg/m³ | 184thof 2,508 | North-western Canada and United States, June 2025 Alberta, Saskatchewan and Manitoba, Canada, May and June 2025 |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Grand Centre's worst days
Daily means, the highest since 1 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Grand Centre, Canada, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ca/grand-centre/history (accessed 13 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.
Grand Centre now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 00:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).