Castellón de la Plana Seasonal Pollution
Castellón de la Plana usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in March. The page uses OpenAQ-derived daily history for 6 mapped monitoring locations in Valencia, Spain.
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Average EPA AQI
26
Rank 158 of 253 cities by average AQI
PM2.5
4.9
ug/m3 annualized city average
Seasonality
November
Cleanest: March
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Castellón de la Plana
25
30
13
20
15
19
25
37
25
27
37
34
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Castellón de la Plana, the current global analytics build covers 347 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.