Abstract: The present invention relates to an evaporation system for rainwater and wastewater designed to reduce or eliminate the storage of water by ground in a parcel of land, comprising a tank made of concrete armour (10), means (16, 17) for supplying the tank (10) with rainwater and wastewater, a source of electric power (15), evaporation means (11) for water in the tank (10) fed electrically by the power source (15), and evacuation means of the steam generated in the tank (10), characterised in that the evaporation means (11) comprise V-shaped rods placed at the bottom of the tank (10) and including a plurality of heating pellets, the evacuation means of the steam including a motorised fan (13) and a conduit of chimney type.