Switzerland Seasonal Pollution
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI. This pilot covers 33 eligible cities with OpenAQ-derived daily AQI history.
Search city analytics
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Hochdorf
-
-
-
-
-
-
-
-
-
-
86
76
Aarau
-
-
-
-
-
-
54
58
62
59
74
75
Allschwil
-
-
-
-
-
-
-
-
44
56
74
76
Langenthal
-
-
-
-
29
49
45
55
45
54
67
71
Opfikon
66
57
49
41
39
50
46
56
33
36
86
57
Morges
-
-
-
-
-
-
-
-
31
47
58
60
Dübendorf
44
42
46
41
37
51
42
55
44
53
62
64
Bern
46
41
42
-
25
44
40
53
43
51
65
68
Methodology
The extractor maps OpenAQ monitoring locations to the nearest AQI Now city in the same country, aggregates PM2.5 and PM10 to daily city averages, and converts those concentrations to US EPA AQI. Country tool pages use only city summaries that satisfy the configured minimum daily coverage threshold.