Le Portel Seasonal Pollution
Le Portel usually records its highest OpenAQ-derived EPA AQI in July and its cleanest month in November. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Hauts-de-France, France.
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Average EPA AQI
15
Rank 215 of 272 cities by average AQI
PM2.5
n/a
ug/m3 annualized city average
Seasonality
July
Cleanest: November
Health indicator
n/a
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Le Portel
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14
19
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13
14
12
17
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Le Portel, the current global analytics build covers 83 daily rows from 2024-01-09 to 2024-12-30. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.