Montlhéry Health Impact
Montlhéry averaged 12.5 ug/m3 PM2.5, equal to 2.5x 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 1 mapped monitoring location in Ile-de-France, France.
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Average EPA AQI
54
Rank 6 of 272 cities by average AQI
PM2.5
12.5
ug/m3 annualized city average
Seasonality
January
Cleanest: August
Health indicator
0.6
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Montlhéry
69
54
59
-
-
50
46
42
47
54
61
58
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Montlhéry, the current global analytics build covers 190 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.