Schwelm Seasonal Pollution
Schwelm usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in April. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in North Rhine-Westphalia, Germany.
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Average EPA AQI
39
Rank 171 of 297 cities by average AQI
PM2.5
7.8
ug/m3 annualized city average
Seasonality
March
Cleanest: April
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Schwelm
46
32
50
30
43
40
31
42
40
34
43
37
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Schwelm, the current global analytics build covers 319 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.