SmogRank / Castlegar / Central Saanich
Castlegar vs Central Saanich: PM2.5 compared
Over the last year, Castlegar's air was about 4.3× as polluted as Central Saanich's: PM2.5 averaged 22.6 µg/m³ against 5.3, on the 50 days both cities were measured. Castlegar had the dirtier air on 46 of those days, Central Saanich on 4. Castlegar was over the WHO's daily guideline of 15 µg/m³ on 18 of them, Central Saanich on 5.
Right now
The last year, day by day
Month by month
Each city's worst days
Castlegar
- 9 Aug 2026193116.0 µg/m³
- 7 Aug 2026187107.0 µg/m³
- 10 Aug 2026184102.0 µg/m³
Central Saanich
- 22 Sept 202613448.8 µg/m³
- 23 Sept 202610336.5 µg/m³
- 5 Aug 202610035.2 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), Kamloops (Canada's 2nd worst on 30 days), Gujranwala (the world's worst on 30 days).
Central Saanich
Side by side with Langford (the nearest), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Castlegar and Central Saanich, 8 Oct 2025 – 7 Oct 2026, smogrank.com/compare/ca-castlegar/ca-central-saanich (accessed 8 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 2026-10-08 20:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published (why we use them).