Saint-Nazaire Seasonal Pollution
Saint-Nazaire usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in May. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Pays de la Loire, France.
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Average EPA AQI
37
Rank 114 of 272 cities by average AQI
PM2.5
7.2
ug/m3 annualized city average
Seasonality
January
Cleanest: May
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Saint-Nazaire
51
40
33
-
26
32
28
27
38
34
49
47
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Saint-Nazaire, the current global analytics build covers 246 daily rows from 2024-01-29 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.