Helsinki Health Impact
Helsinki averaged 5.8 ug/m3 PM2.5, equal to 1.2x 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 3 mapped monitoring locations in Uusimaa, Finland.
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Average EPA AQI
31
Rank 1 of 22 cities by average AQI
PM2.5
5.8
ug/m3 annualized city average
Seasonality
May
Cleanest: December
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Helsinki
31
31
40
31
41
33
33
32
37
24
21
19
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Helsinki, the current global analytics build covers 350 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.