Campbell River vs Castlegar: PM2.5 compared

Over the last year, Castlegar's air was about 3.1× as polluted as Campbell River's: PM2.5 averaged 11.0 µg/m³ against 3.6, on the 321 days both cities were measured. Castlegar had the dirtier air on 276 of those days, Campbell River on 44. Castlegar was over the WHO's daily guideline of 15 µg/m³ on 38 of them, Campbell River on 0.

Right now

Campbell River#1,487on the 24-hour board of 2,002, at 26 US AQI (4.6 µg/m³)

Castlegar#770on the 24-hour board of 2,002, at 45 US AQI (8.1 µg/m³)

The last year, day by day

Campbell River

Castlegar

Each city's daily mean from 7 Oct 2025 to 6 Oct 2026, one stripe a day, coloured by band. A blank stripe is a day without a daily mean.

Month by month

Monthly means in µg/m³ over the days both cities were measured. Solid: Campbell River. Faded: Castlegar. A month shows once both share 10 such days. Dashed line: the WHO daily guideline, 15 µg/m³.

Year by year

Year	Campbell River	Castlegar	Days both measured	Days Campbell River was worse
2026 so far	17	57	244	22
2025	21	41	297	39
2024	17	40	349	34
2023	20	55	270	32

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

Campbell River

26 Jan 20265712.1 µg/m³
22 Jul 20265611.6 µg/m³
15 Aug 20265511.1 µg/m³

Castlegar

11 Aug 2026227152.0 µg/m³
9 Aug 2026193116.0 µg/m³
7 Aug 2026187107.0 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

Campbell River

Side by side with Courtenay (the nearest), Gujranwala (the world's worst on 30 days).

Castlegar

Side by side with Creston (the nearest), Edmonton (Canada's 2nd worst on 30 days), Gujranwala (the world's worst on 30 days).

Use this page

SmogRank, PM2.5 daily means compared, Campbell River and Castlegar, 7 Oct 2025 – 6 Oct 2026, smogrank.com/compare/ca-campbell-river/ca-castlegar (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.