Calais Health Impact
Calais averaged 10.0 ug/m3 PM2.5, equal to 2.0x the WHO annual PM2.5 guideline and about 0.5 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in Hauts-de-France, France.
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Average EPA AQI
35
Rank 136 of 272 cities by average AQI
PM2.5
10.0
ug/m3 annualized city average
Seasonality
November
Cleanest: March
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Calais
18
14
14
22
47
31
39
38
33
41
52
48
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Calais, the current global analytics build covers 314 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.