Allschwil Seasonal Pollution
Allschwil usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in September. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Basel-Landschaft, Switzerland.
Search city analytics
Average EPA AQI
64
Rank 3 of 33 cities by average AQI
PM2.5
18.4
ug/m3 annualized city average
Seasonality
December
Cleanest: September
Health indicator
0.8
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Allschwil
-
-
-
-
-
-
-
-
44
56
74
76
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Allschwil, the current global analytics build covers 114 daily rows from 2024-09-08 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.