Barrie Seasonal Pollution
Barrie usually records its highest OpenAQ-derived EPA AQI in August and its cleanest month in April. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Ontario, Canada.
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Average EPA AQI
36
Rank 40 of 158 cities by average AQI
PM2.5
7.0
ug/m3 annualized city average
Seasonality
August
Cleanest: April
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Barrie
37
40
28
26
32
38
42
45
42
37
27
33
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Barrie, the current global analytics build covers 365 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.