SmogRank / Canada / Saskatchewan / Estevan
Estevan, month by month
Estevan has a measured daily mean on 1,193 days since 7 May 2023. Its worst month was September 2023, at 86 US AQI (28.1 µg/m³), 43rd of 2,176 cities on that month's world ranking. Its cleanest was January 2025, at 28 US AQI (5.0 µg/m³). 2025 averaged 58 US AQI (12.7 µg/m³), against 52 US AQI (9.8 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
1 month
| Month | Why |
|---|---|
| Jul 2023 | 21 of 31 days measured; a month needs 22. The others: 8 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours), 1 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Estevan's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| September 2023 | 8628.1 µg/m³ | 43rdof 2,176 | Alberta, Saskatchewan and British Columbia, Canada, September 2023 Northern United States and Canada, August and September 2023and 1 more |
| July 2024 | 8326.4 µg/m³ | 68thof 2,566 | North-western United States and Canada, July 2024 Alberta, Saskatchewan and Manitoba, Canada, July 2024 |
| July 2025 | 8225.8 µg/m³ | 129thof 2,889 | North-western Canada and United States, 19 to 22 July 2025 |
| June 2025 | 8125.0 µg/m³ | 168thof 2,508 | North-western Canada and United States, June 2025 Alberta, Saskatchewan and Manitoba, Canada, May and June 2025 |
| August 2023 | 7421.5 µg/m³ | 113thof 1,980 | Northern United States and Canada, August and September 2023 |
| August 2025 | 7120.1 µg/m³ | 201stof 2,901 | North-western United States and Canada, August and September 2025 Western Canada and United States, August 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.
Estevan's worst days
| Day | US AQI | Episode |
|---|---|---|
| 31 May 2025 | 292217.0 µg/m³ | Alberta, Saskatchewan and Manitoba, Canada, May and June 2025 |
| 17 May 2023 | 261186.0 µg/m³ | Northern United States and Canada, May 2023 |
| 10 Aug 2025 | 194117.0 µg/m³ | Western Canada and United States, August 2025 |
| 10 Jun 2025 | 184103.0 µg/m³ | North-western Canada and United States, June 2025 |
| 30 May 2025 | 183101.0 µg/m³ | Alberta, Saskatchewan and Manitoba, Canada, May and June 2025 |
| 12 Jul 2025 | 18199.0 µg/m³ | – |
| 1 Jun 2025 | 17893.8 µg/m³ | Alberta, Saskatchewan and Manitoba, Canada, May and June 2025 |
| 11 Jun 2025 | 17893.5 µg/m³ | North-western Canada and United States, June 2025 |
| 4 Sept 2024 | 17590.3 µg/m³ | – |
| 3 Sept 2023 | 17488.4 µg/m³ | Northern United States and Canada, August and September 2023 |
Daily means, the highest since 7 May 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, Estevan, Canada, 7 May 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ca/estevan/history (accessed 12 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.
Estevan now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).