La Roche-sur-Yon Seasonal Pollution
La Roche-sur-Yon usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in July. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Pays de la Loire, France.
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Average EPA AQI
40
Rank 66 of 272 cities by average AQI
PM2.5
8.4
ug/m3 annualized city average
Seasonality
January
Cleanest: July
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
La Roche-sur-Yon
58
41
39
-
-
28
25
27
36
36
45
48
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For La Roche-sur-Yon, the current global analytics build covers 205 daily rows from 2024-01-02 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.