Canada Seasonal Pollution
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI. This pilot covers 158 eligible cities with OpenAQ-derived daily AQI history.
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Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Cambridge
-
-
-
69
47
52
57
58
53
37
37
51
East St. Paul
-
-
-
-
-
-
77
68
54
32
36
33
Welland
-
-
-
-
-
-
73
62
46
41
36
48
Wood Buffalo
31
37
40
30
39
28
120
80
73
30
31
35
Yellowknife
-
-
-
-
-
18
71
63
49
39
46
45
Edmonton
57
43
37
23
42
28
77
77
44
31
49
57
Markham
-
-
-
-
-
-
-
-
59
42
34
51
Kitchener
-
-
-
-
-
-
-
-
-
53
37
50
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.