Roztoky Seasonal Pollution
Roztoky usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in September. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Středočeský Kraj, Czech Republic.
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Average EPA AQI
44
Rank 43 of 61 cities by average AQI
PM2.5
18.0
ug/m3 annualized city average
Seasonality
November
Cleanest: September
Health indicator
0.8
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Roztoky
20
13
26
12
38
61
43
15
6
84
105
90
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Roztoky, the current global analytics build covers 347 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.