Saint John Health Impact
Saint John averaged 4.3 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 1 mapped monitoring location in New Brunswick, Canada.
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Average EPA AQI
23
Rank 126 of 158 cities by average AQI
PM2.5
4.3
ug/m3 annualized city average
Seasonality
August
Cleanest: November
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Saint John
20
19
17
20
21
30
34
36
24
22
15
20
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Saint John, the current global analytics build covers 359 daily rows from 2024-01-01 to 2024-12-31. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.