Palmerston Seasonal Pollution
Palmerston usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in December. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in Fingal, Ireland.
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Average EPA AQI
18
Rank 16 of 20 cities by average AQI
PM2.5
8.3
ug/m3 annualized city average
Seasonality
March
Cleanest: December
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Palmerston
41
34
41
13
16
10
9
11
15
10
14
7
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Palmerston, the current global analytics build covers 324 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.