Utrecht Seasonal Pollution
Utrecht usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in April. The page uses OpenAQ-derived daily history for 5 mapped monitoring locations in Utrecht, Netherlands.
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Average EPA AQI
51
Rank 17 of 71 cities by average AQI
PM2.5
12.0
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
Utrecht
57
53
48
35
61
47
40
45
51
53
62
63
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Utrecht, the current global analytics build covers 365 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.