Collado-Villalba Seasonal Pollution
Collado-Villalba usually records its highest OpenAQ-derived EPA AQI in August and its cleanest month in March. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in Madrid, Spain.
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Average EPA AQI
51
Rank 12 of 253 cities by average AQI
PM2.5
12.3
ug/m3 annualized city average
Seasonality
August
Cleanest: March
Health indicator
0.6
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Collado-Villalba
56
46
33
49
46
49
55
71
48
47
52
56
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Collado-Villalba, the current global analytics build covers 291 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.