Velsen-Zuid Seasonal Pollution
Velsen-Zuid usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in July. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Noord-Holland, Netherlands.
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Average EPA AQI
48
Rank 20 of 71 cities by average AQI
PM2.5
10.0
ug/m3 annualized city average
Seasonality
March
Cleanest: July
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Velsen-Zuid
-
-
59
47
54
47
39
45
45
41
51
53
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Velsen-Zuid, the current global analytics build covers 291 daily rows from 2024-01-23 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.