Kościan Seasonal Pollution
Kościan usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in July. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Wielkopolskie, Poland.
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Average EPA AQI
62
Rank 43 of 155 cities by average AQI
PM2.5
17.1
ug/m3 annualized city average
Seasonality
March
Cleanest: July
Health indicator
0.8
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Kościan
87
74
90
53
47
46
37
45
53
69
78
77
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Kościan, the current global analytics build covers 349 daily rows from 2024-01-03 to 2024-12-19. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.