Ottawa Health Impact
Ottawa averaged 7.4 ug/m3 PM2.5, equal to 1.5x the WHO annual PM2.5 guideline and about 0.3 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 5 mapped monitoring locations in Ontario, Canada.
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Average EPA AQI
35
Rank 49 of 158 cities by average AQI
PM2.5
7.4
ug/m3 annualized city average
Seasonality
July
Cleanest: April
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Ottawa
32
37
24
19
32
40
51
49
40
29
21
39
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Ottawa, the current global analytics build covers 367 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.