Cluj-Napoca Seasonal Pollution
Cluj-Napoca usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in May. The page uses OpenAQ-derived daily history for 8 mapped monitoring locations in Cluj, Romania.
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Average EPA AQI
61
Rank 6 of 69 cities by average AQI
PM2.5
16.0
ug/m3 annualized city average
Seasonality
March
Cleanest: May
Health indicator
0.7
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Cluj-Napoca
71
71
86
59
42
44
49
48
47
58
83
75
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Cluj-Napoca, the current global analytics build covers 367 daily rows from 2023-12-31 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.