Question 1

What is the population of Saint-Jean-sur-Mayenne?

Accepted Answer

The commune of Saint-Jean-sur-Mayenne has 1,689 inhabitants per the INSEE census.

Question 2

Are there natural risks in Saint-Jean-sur-Mayenne?

Accepted Answer

Yes, Saint-Jean-sur-Mayenne is exposed to 15 natural risk(s): Affaissements et effondrements d'origine naturelle (cavités souterraines), Eboulement ou chutes de pierres et de blocs, Foudre, Grêle, Inondation, Mouvement de terrain, Neige et pluies verglaçantes, Par remontées de nappes naturelles, Par une crue à débordement lent de cours d'eau, Phénomène lié à l'atmosphère, Radon, Rupture de barrage, Séisme, Tempête et grains (vent), Transport de marchandises dangereuses. Source: Géorisques / GASPAR.

Question 3

What is the energy performance of homes in Saint-Jean-sur-Mayenne?

Accepted Answer

Out of 115 ADEME EPCs available in Saint-Jean-sur-Mayenne, the most common label is C. 6% are rated A or B.

Question 4

What is the crime rate in Saint-Jean-sur-Mayenne?

Accepted Answer

In 2025, the crime rate in Saint-Jean-sur-Mayenne was 6.4 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-Jean-sur-Mayenne?

Accepted Answer

Tap water in Saint-Jean-sur-Mayenne is compliant with quality standards. Source: ARS / Hub'eau. (1203 analyses over 12 months)

Question 6

What is the air quality in Saint-Jean-sur-Mayenne?

Accepted Answer

According to LCSQA stations (5-year mean) in Saint-Jean-sur-Mayenne: PM2.5 : 8.7 µg/m³, NO₂ : 13.0 µg/m³, PM10 : 14.2 µg/m³. Source: LCSQA / Géod'air.