Saint-Quentin Seasonal Pollution
Saint-Quentin usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in March. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Hauts-de-France, France.
Search city analytics
Average EPA AQI
44
Rank 29 of 272 cities by average AQI
PM2.5
9.3
ug/m3 annualized city average
Seasonality
January
Cleanest: March
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Saint-Quentin
51
39
36
38
51
46
40
42
43
44
50
47
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Saint-Quentin, the current global analytics build covers 329 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.