Alfaro Seasonal Pollution
Alfaro usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in March. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in La Rioja, Spain.
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Average EPA AQI
36
Rank 105 of 253 cities by average AQI
PM2.5
7.1
ug/m3 annualized city average
Seasonality
November
Cleanest: March
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Alfaro
38
30
19
31
20
40
49
49
42
47
51
39
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Alfaro, the current global analytics build covers 255 daily rows from 2024-01-01 to 2024-12-16. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.