Inaugurated in 2025, this unconventional water system captures, treats, infiltrates, and reuses rainwater. The objective is to view this water as an alternative resource for various uses that do not require drinking water quality.
The project aims to promote the infiltration and storage of rainwater in the natural environment, preserve the groundwater aquifers which are the sole source of drinking water for Bordeaux Métropole, and develop environmental co-benefits using nature-based solutions.
The system involves pumping from the Beaudésert basin, treatment via reed beds (2x100m²), activated carbon filtration, and two infiltration basins (one bare, one planted with local species adapted to the Gironde climate, 2x250m²). The water is then infiltrated into the Plio-Quaternary aquifer, which is not used for drinking water production.
A distribution point, connected to a borehole, makes this unconventional water available. Prior user agreement is required, and a magnetic card must be credited. The water price is set at €0.54/m³. The distributed water is non-potable and can be used for irrigating green spaces, street cleaning, or sanitation network cleaning, adhering to health guidelines and requiring an anti-backflow system.
Water is available year-round. The distributed waters are non-potable and offered at the same price, regardless of the distribution point, accessible with a single magnetic card.
