Brentford Seasonal Pollution
Brentford usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in December. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Hounslow, United Kingdom.
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Average EPA AQI
38
Rank 68 of 171 cities by average AQI
PM2.5
8.3
ug/m3 annualized city average
Seasonality
December
Cleanest: December
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Brentford
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38
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Brentford, the current global analytics build covers 22 daily rows from 2024-12-10 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.