Question 1

What is the population of Sannois?

Accepted Answer

The commune of Sannois has 26,772 inhabitants per the INSEE census.

Question 2

Are there natural risks in Sannois?

Accepted Answer

Yes, Sannois is exposed to 4 natural risk(s): Inondation, Mouvement de terrain, Tassements différentiels, Transport de marchandises dangereuses. Source: Géorisques / GASPAR.

Question 3

What is the energy performance of homes in Sannois?

Accepted Answer

Out of 832 ADEME EPCs available in Sannois, the most common label is E. 3% are rated A or B.

Question 4

What is the crime rate in Sannois?

Accepted Answer

In 2025, the crime rate in Sannois was 31.3 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 Sannois?

Accepted Answer

Tap water in Sannois is compliant with quality standards. Source: ARS / Hub'eau. (433 analyses over 12 months)

Question 6

What is the air quality in Sannois?

Accepted Answer

According to LCSQA stations (5-year mean) in Sannois: PM2.5 : 10.5 µg/m³, NO₂ : 23.7 µg/m³, PM10 : 20.3 µg/m³. Source: LCSQA / Géod'air.