Riehen Health Impact
Riehen averaged 10.8 ug/m3 PM2.5, equal to 2.2x 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 Basel-Stadt, Switzerland.
Search city analytics
Average EPA AQI
46
Rank 11 of 33 cities by average AQI
PM2.5
10.8
ug/m3 annualized city average
Seasonality
January
Cleanest: May
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Riehen
66
46
47
33
29
43
34
47
42
45
60
59
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Riehen, the current global analytics build covers 363 daily rows from 2024-01-01 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.