Rotterdam Seasonal Pollution
Rotterdam usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in April. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Zuid-Holland, Netherlands.
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Average EPA AQI
44
Rank 25 of 71 cities by average AQI
PM2.5
10.0
ug/m3 annualized city average
Seasonality
December
Cleanest: April
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Rotterdam
37
34
45
28
50
38
37
47
52
50
54
55
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Rotterdam, the current global analytics build covers 362 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.