Question 1

What is the population of Saint-Denis?

Accepted Answer

The commune of Saint-Denis has 148,907 inhabitants per the INSEE census.

Question 2

Are there natural risks in Saint-Denis?

Accepted Answer

Yes, Saint-Denis is exposed to 11 natural risk(s): Affaissements et effondrements d'origine anthropique (anciennes carrières souterraines, hors mines), Inondation, Mouvement de terrain, Par remontées de nappes naturelles, Par ruissellement et coulée de boue, Par une crue à débordement lent de cours d'eau, Phénomène lié à l'atmosphère, Risque industriel, Tassements différentiels, Tempête et grains (vent), Transport de marchandises dangereuses. Source: Géorisques / GASPAR.

Question 3

What is the energy performance of homes in Saint-Denis?

Accepted Answer

Out of 903 ADEME EPCs available in Saint-Denis, the most common label is D. 2% are rated A or B.

Question 4

What is the crime rate in Saint-Denis?

Accepted Answer

In 2025, the crime rate in Saint-Denis was 45.6 offences per 1,000 inhabitants (burglaries, theft, violence, vandalism). Source: SSMSI / French Ministry of the Interior.

Question 5

Is the tap water safe to drink in Saint-Denis?

Accepted Answer

Tap water in Saint-Denis is compliant with quality standards. Source: ARS / Hub'eau. (2139 analyses over 12 months)

Question 6

What is the air quality in Saint-Denis?

Accepted Answer

According to LCSQA stations (5-year mean) in Saint-Denis: PM2.5 : 13.7 µg/m³, NO₂ : 35.7 µg/m³, PM10 : 28.4 µg/m³. Source: LCSQA / Géod'air.