Norrköping Seasonal Pollution
Norrköping usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in November. The page uses OpenAQ-derived daily history for 5 mapped monitoring locations in Östergötland, Sweden.
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Average EPA AQI
29
Rank 9 of 31 cities by average AQI
PM2.5
5.7
ug/m3 annualized city average
Seasonality
March
Cleanest: November
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Norrköping
19
36
41
30
39
29
25
31
32
27
19
22
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Norrköping, the current global analytics build covers 363 daily rows from 2024-01-03 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.