Rotterdam Seasonal Pollution
Rotterdam usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in April. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in South Holland, Netherlands.
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Average EPA AQI
15
Rank 55 of 71 cities by average AQI
PM2.5
7.8
ug/m3 annualized city average
Seasonality
January
Cleanest: April
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Rotterdam
37
-
12
10
17
14
12
15
20
14
17
14
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 255 daily rows from 2024-01-04 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.