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Arrigorriaga Seasonal Pollution

Arrigorriaga usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in March. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Basque Country, Spain.

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Average EPA AQI

41

Rank 81 of 253 cities by average AQI

PM2.5

8.3

ug/m3 annualized city average

Seasonality

January

Cleanest: March

Health indicator

0.4

cigarette-equivalent per day

Yearly EPA AQI trend

0501002024Arrigorriaga

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec
Arrigorriaga
47
45
22
34
38
46
46
45
37
33
45
42

What this seasonality page measures

Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.

For Arrigorriaga, the current global analytics build covers 314 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.

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