Since 1995 all French communes are legally obliged to have a Plan for Prevention of Risks (P.P.R). This plan aims to inform buyers and tenants of real estate about the main risks (technological or natural) that the real estate might be exposed to.

The PPR is made to inform to inform about technological / natural  risks before any real estate transaction (sale or rental) concerning real estate situated on an area governed by a PPR, or in a seismic area.

To know more : http://www.haute-savoie.pref.gouv.fr/securite/civile/risques-majeurs/index.php