Saint John AQI Trends
Saint John AQI was measured in 2024, with a trend delta of n/a AQI points. 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 trends page measures
Compare yearly air-quality direction, best years, worst years, and trend deltas.
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.