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Saint-Denis Seasonal Pollution

Saint-Denis usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in August. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Ile-de-France, France.

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Average EPA AQI

58

Rank 3 of 272 cities by average AQI

PM2.5

13.9

ug/m3 annualized city average

Seasonality

December

Cleanest: August

Health indicator

0.6

cigarette-equivalent per day

Yearly EPA AQI trend

0501002024Saint-Denis

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec
Saint-Denis
67
51
54
-
-
51
53
51
58
61
68
68

What this seasonality page measures

Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.

For Saint-Denis, the current global analytics build covers 200 daily rows from 2024-01-02 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.

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