Trail Health Impact
Trail averaged 8.6 ug/m3 PM2.5, equal to 1.7x the WHO annual PM2.5 guideline and about 0.4 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 5 mapped monitoring locations in British Columbia, Canada.
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Average EPA AQI
40
Rank 19 of 158 cities by average AQI
PM2.5
8.6
ug/m3 annualized city average
Seasonality
January
Cleanest: June
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Trail
52
41
33
32
27
25
51
46
39
45
46
45
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Trail, the current global analytics build covers 361 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.