Shumen Seasonal Pollution
Shumen usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in May. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Shumen, Bulgaria.
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Average EPA AQI
21
Rank 27 of 35 cities by average AQI
PM2.5
n/a
ug/m3 annualized city average
Seasonality
March
Cleanest: May
Health indicator
n/a
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Shumen
21
21
27
20
15
20
21
20
-
27
26
18
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Shumen, the current global analytics build covers 294 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.