Södertälje Seasonal Pollution
Södertälje usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in January. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Stockholm, Sweden.
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Average EPA AQI
13
Rank 27 of 31 cities by average AQI
PM2.5
n/a
ug/m3 annualized city average
Seasonality
March
Cleanest: January
Health indicator
n/a
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Södertälje
6
15
29
20
22
12
8
10
12
11
11
6
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Södertälje, the current global analytics build covers 319 daily rows from 2024-01-01 to 2024-12-16. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.