Zarautz Seasonal Pollution
Zarautz usually records its highest OpenAQ-derived EPA AQI in September and its cleanest month in March. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Basque Country, Spain.
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Average EPA AQI
26
Rank 156 of 253 cities by average AQI
PM2.5
4.9
ug/m3 annualized city average
Seasonality
September
Cleanest: March
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Zarautz
28
24
16
25
22
29
25
28
36
26
29
25
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Zarautz, the current global analytics build covers 296 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.