Beasain Seasonal Pollution
Beasain usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in September. The page uses OpenAQ-derived daily history for 5 mapped monitoring locations in Basque Country, Spain.
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Average EPA AQI
41
Rank 72 of 253 cities by average AQI
PM2.5
9.7
ug/m3 annualized city average
Seasonality
November
Cleanest: September
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Beasain
37
48
26
40
39
48
44
36
23
40
56
51
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Beasain, the current global analytics build covers 344 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.