New Zealand Seasonal Pollution
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI. This pilot covers 7 eligible cities with OpenAQ-derived daily AQI history.
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Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Kairaki
24
24
30
36
69
68
69
58
36
28
32
27
Timaru
27
30
33
41
52
62
59
52
35
31
38
29
Ashton
23
29
31
34
56
62
58
48
26
26
31
26
Christchurch
24
27
30
32
59
55
65
51
27
24
26
22
Dunedin
-
-
-
-
-
-
60
49
22
22
19
16
Levin
-
-
-
-
-
-
-
-
-
-
12
16
Northcote
-
-
-
-
-
-
-
-
8
5
5
3
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.