Niel Seasonal Pollution
Niel usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in July. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Flanders, Belgium.
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Average EPA AQI
61
Rank 3 of 67 cities by average AQI
PM2.5
16.4
ug/m3 annualized city average
Seasonality
December
Cleanest: July
Health indicator
0.7
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Niel
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-
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61
49
56
58
56
74
74
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Niel, the current global analytics build covers 185 daily rows from 2024-06-01 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.