Langley Health Impact
Langley averaged 4.4 ug/m3 PM2.5, equal to 0.9x 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 2 mapped monitoring locations in British Columbia, Canada.
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Average EPA AQI
24
Rank 121 of 158 cities by average AQI
PM2.5
4.4
ug/m3 annualized city average
Seasonality
August
Cleanest: June
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Langley
21
24
25
26
23
20
26
29
21
23
27
23
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Langley, 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.