Upplands Väsby Seasonal Pollution
Upplands Väsby usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in November. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Stockholm, Sweden.
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Average EPA AQI
24
Rank 19 of 31 cities by average AQI
PM2.5
4.4
ug/m3 annualized city average
Seasonality
March
Cleanest: November
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Upplands Väsby
20
29
41
23
30
22
20
23
25
22
16
19
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Upplands Väsby, the current global analytics build covers 335 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.