Thiais Health Impact
Thiais averaged 8.6 ug/m3 PM2.5, equal to 1.7x the WHO annual PM2.5 guideline and about 0.4 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
41
Rank 57 of 272 cities by average AQI
PM2.5
8.6
ug/m3 annualized city average
Seasonality
January
Cleanest: July
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Thiais
59
41
34
32
37
35
32
35
40
40
51
50
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Thiais, the current global analytics build covers 297 daily rows from 2024-01-02 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.