SmogRank / Castlegar / Fort Saskatchewan
Castlegar vs Fort Saskatchewan: PM2.5 compared
Over the last year, Castlegar's air was 27% more polluted than Fort Saskatchewan's: PM2.5 averaged 11.2 µg/m³ against 8.8, on the 314 days both cities were measured. Castlegar had the dirtier air on 166 of those days, Fort Saskatchewan on 147. Castlegar was over the WHO's daily guideline of 15 µg/m³ on 39 of them, Fort Saskatchewan on 29.
Right now
The last year, day by day
Month by month
Year by year
| Year | Castlegar | Fort Saskatchewan | Days Castlegar was worse |
|---|---|---|---|
| 2026 so far | 57 | 49 | 127 |
| 2025 | 41 | 54 | 125 |
| 2024 | 39 | 56 | 134 |
| 2023 | 54 | 72 | 88 |
Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.
Each city's worst days
Castlegar
- 11 Aug 2026227152.0 µg/m³
- 9 Aug 2026193116.0 µg/m³
- 7 Aug 2026187107.0 µg/m³
Fort Saskatchewan
- 21 Jul 202616676.4 µg/m³
- 20 Jul 202615764.5 µg/m³
- 26 Nov 202515764.0 µg/m³
Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.
Compare either city with another
Castlegar
Side by side with Creston (the nearest), Edmonton (Canada's 2nd worst on 30 days), Gujranwala (the world's worst on 30 days).
Fort Saskatchewan
Side by side with Sherwood Park (the nearest), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Castlegar and Fort Saskatchewan, 7 Oct 2025 – 6 Oct 2026, smogrank.com/compare/ca-castlegar/ca-fort-saskatchewan (accessed 7 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.
The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.
Updated 2026-10-07 08:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.