Piraeus Seasonal Pollution
Piraeus usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in May. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in Attikí, Greece.
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Average EPA AQI
51
Rank 12 of 22 cities by average AQI
PM2.5
11.4
ug/m3 annualized city average
Seasonality
November
Cleanest: May
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Piraeus
55
57
49
52
47
52
49
48
50
49
59
49
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Piraeus, the current global analytics build covers 294 daily rows from 2024-01-01 to 2024-12-31. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.