Auch Seasonal Pollution
Auch usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in March. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Occitanie, France.
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Average EPA AQI
27
Rank 186 of 272 cities by average AQI
PM2.5
5.0
ug/m3 annualized city average
Seasonality
November
Cleanest: March
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Auch
32
23
13
20
19
25
32
31
29
24
36
29
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Auch, the current global analytics build covers 298 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.