Palaiseau vs Saint-Denis AQI Comparison

Side-by-side OpenAQ-derived air quality comparison for Palaiseau and Saint-Denis. Values use mapped daily PM2.5 and PM10 observations normalized to US EPA AQI.

Lower average AQI: Saint-Denis (6-pt gap)PM2.5: Palaiseau 18.0 ug/m3 · Saint-Denis 13.9 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-10-01–2024-12-31 and 2024-01-02–2024-12-30.

Compare two cities

City A

City B

Palaiseau vs Saint-Denis

Palaiseau

Ile-de-France, France

PM2.5: 18.0 ug/m3
PM10: 19.7 ug/m3
Worst month: November
Trend: n/a

EPA category: Moderate

Saint-Denis

Ile-de-France, France

PM2.5: 13.9 ug/m3
PM10: 28.5 ug/m3
Worst month: December
Trend: n/a

EPA category: Moderate

Lower average AQI in this selected period: Saint-Denis. Values are historical OpenAQ-derived city summaries, not live readings.

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Palaiseau

Saint-Denis

What this comparison measures

Average EPA AQI — city-level daily AQI values averaged across the OpenAQ coverage window.
PM2.5 and PM10 — mapped monitor concentrations aggregated to daily city averages.
Seasonality — worst and cleanest months from the monthly city rollups.
Trend — difference between the earliest and latest yearly AQI average in this build.