Charneca Seasonal Pollution
Charneca usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in May. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Setúbal, Portugal.
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Average EPA AQI
44
Rank 9 of 58 cities by average AQI
PM2.5
10.4
ug/m3 annualized city average
Seasonality
December
Cleanest: May
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Charneca
-
-
-
36
35
47
37
40
48
36
53
63
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Charneca, the current global analytics build covers 257 daily rows from 2024-04-15 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.