Ostrava Seasonal Pollution
Ostrava usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in July. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Moravskoslezský Kraj, Czech Republic.
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Average EPA AQI
62
Rank 9 of 61 cities by average AQI
PM2.5
16.9
ug/m3 annualized city average
Seasonality
December
Cleanest: July
Health indicator
0.8
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Ostrava
72
57
72
50
50
50
49
57
51
66
71
84
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Ostrava, the current global analytics build covers 300 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.