Saint-Denis Health Impact
Saint-Denis averaged 13.9 ug/m3 PM2.5, equal to 2.8x the WHO annual PM2.5 guideline and about 0.6 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Ile-de-France, France.
Search city analytics
Average EPA AQI
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
Seasonal EPA AQI heatmap
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
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.