North Cowichan Health Impact
North Cowichan averaged 3.6 ug/m3 PM2.5, equal to 0.7x the WHO annual PM2.5 guideline and about 0.2 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in British Columbia, Canada.
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Average EPA AQI
Rank 152 of 158 cities by average AQI
PM2.5
3.6
ug/m3 annualized city average
Seasonality
July
Cleanest: April
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For North Cowichan, the current global analytics build covers 336 daily rows from 2024-01-01 to 2025-01-01. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.