Portugal Seasonal Pollution
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI. This pilot covers 58 eligible cities with OpenAQ-derived daily AQI history.
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Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Lousã
101
73
56
48
44
56
49
55
74
44
69
102
Lordelo do Ouro
-
-
-
-
-
-
53
56
84
47
53
78
Portela
54
49
34
-
-
-
-
-
-
-
-
-
Aldeia de Paio Pires
58
46
29
-
-
-
-
24
-
-
-
-
Lisbon
47
43
38
-
-
-
-
20
52
41
57
57
Marinha Grande
51
55
39
-
-
-
-
19
-
24
-
-
Rio de Mouro
53
46
31
-
-
-
-
27
-
-
-
-
Santo André
51
57
49
29
36
47
41
49
52
38
45
49
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.