Halifax Seasonal Pollution
Halifax usually records its highest OpenAQ-derived EPA AQI in August and its cleanest month in November. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Nova Scotia, Canada.
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Average EPA AQI
22
Rank 144 of 158 cities by average AQI
PM2.5
4.1
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
Halifax
20
18
14
17
14
28
37
40
21
19
12
17
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Halifax, the current global analytics build covers 366 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.