Williams Lake Health Impact
Williams Lake averaged 2.9 ug/m3 PM2.5, equal to 0.6x the WHO annual PM2.5 guideline and about 0.1 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 158 of 158 cities by average AQI
PM2.5
2.9
ug/m3 annualized city average
Seasonality
August
Cleanest: June
Health indicator
0.1
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 Williams Lake, the current global analytics build covers 367 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.