Question 1

What is the population of Grignon?

Accepted Answer

The commune of Grignon has 191 inhabitants per the INSEE census.

Question 2

Are there natural risks in Grignon?

Accepted Answer

Yes, Grignon is exposed to 5 natural risk(s): Affaissements et effondrements d'origine anthropique (anciennes carrières souterraines, hors mines), Mouvement de terrain, Rupture de barrage, Tassements différentiels, Transport de marchandises dangereuses. Source: Géorisques / GASPAR.

Question 3

What is the energy performance of homes in Grignon?

Accepted Answer

Out of 18 ADEME EPCs available in Grignon, the most common label is E. 0% are rated A or B.

Question 4

What is the crime rate in Grignon?

Accepted Answer

In 2025, the crime rate in Grignon was 0 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 Grignon?

Accepted Answer

Tap water in Grignon is compliant with quality standards. Source: ARS / Hub'eau. (463 analyses over 12 months)

Question 6

What is the air quality in Grignon?

Accepted Answer

According to LCSQA stations (5-year mean) in Grignon: PM2.5 : 6.9 µg/m³, NO₂ : 10.1 µg/m³, PM10 : 12.4 µg/m³. Source: LCSQA / Géod'air.