Latvia Seasonal Pollution
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI. This pilot covers 4 eligible cities with OpenAQ-derived daily AQI history.
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Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Liepāja
50
54
60
53
49
42
33
37
46
47
46
50
Rēzekne
73
55
69
53
52
46
31
31
47
49
39
46
Riga
54
47
52
43
46
41
31
32
39
42
32
39
Ventspils
44
42
47
40
41
36
24
28
27
44
40
44
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.