Question 1

What is the population of Cachan?

Accepted Answer

The commune of Cachan has 30,526 inhabitants per the INSEE census.

Question 2

Are there natural risks in Cachan?

Accepted Answer

Yes, Cachan is exposed to 2 natural risk(s): Mouvement de terrain, Transport de marchandises dangereuses. Source: Géorisques / GASPAR.

Question 3

What is the energy performance of homes in Cachan?

Accepted Answer

Out of 510 ADEME EPCs available in Cachan, the most common label is E. 3% are rated A or B.

Question 4

What is the crime rate in Cachan?

Accepted Answer

In 2025, the crime rate in Cachan was 35.5 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 Cachan?

Accepted Answer

Tap water in Cachan is compliant with quality standards. Source: ARS / Hub'eau. (684 analyses over 12 months)

Question 6

What is the air quality in Cachan?

Accepted Answer

According to LCSQA stations (5-year mean) in Cachan: PM2.5 : 10.2 µg/m³, NO₂ : 27.5 µg/m³, PM10 : 21.4 µg/m³. Source: LCSQA / Géod'air.