The Prieuré plant

The Prieuré treatment and pumping station is the main drinking water production plant in the Canton of Geneva.


This site is not accessible to visitors. 



Since the 18th century, the lake has been the main source of water for Geneva. Given the deterioration of the water quality, the construction of a filtration station at the Prieuré site was begun in 1948, which was commissioned in 1957.

It is at this Prieuré facility that the raw water collected from the lake is treated. Once all impurities have been cleared, the drinking water is pumped and distributed across the Geneva network.

Key figures

Key figures

3,300 litres/second

of water collected from Lake Geneva

33 metres

depth at which water is collected

10 degrees

average water temperature