San Martín de Valdeiglesias Seasonal Pollution
San Martín de Valdeiglesias usually records its highest OpenAQ-derived EPA AQI in August and its cleanest month in March. The page uses OpenAQ-derived daily history for 6 mapped monitoring locations in Madrid, Spain.
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Average EPA AQI
36
Rank 110 of 253 cities by average AQI
PM2.5
7.8
ug/m3 annualized city average
Seasonality
August
Cleanest: March
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
San Martín de Valdeiglesias
37
31
24
36
31
32
52
55
26
35
30
33
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For San Martín de Valdeiglesias, the current global analytics build covers 309 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.