Leveneur (Reunion Island)

Leveneur: drinking water in all weather conditions

On the municipality of Leveneur, Stereau won in 2019 the design-build contract for the largest drinking water production unit in Réunion Island, entrusted by the South Island Agglomeration Community of Réunion (CASUD). With a capacity of 30,000 m3/day, the new plant represents a significant contribution to food security and the quality of drinking water for nearly 78,000 Reunionese.

Architectural view of the Leveneur drinking water production plant on Reunion Island, designed and built by Stereau. A benchmark in drinking water treatment on Reunion Island.

The challenges

  • To design a drinking water production plant capable of treating highly polluted surface waters subject to turbidity phenomena.
  • To secure the supply of high-quality drinking water for nearly 70,000 residents of the municipalities of Le Tampon and Saint-Joseph, Réunion.
  • To enhance the water storage capacity of CASUD in case of water cuts.

Our solutions

The Leveneur drinking water production plant implements a complete water treatment process: pre-mineralization, coagulation, flocculation, sedimentation filtration, UV disinfection for the elimination of viruses, bacteria, and parasites, followed by chlorination.

The construction of two reservoirs for raw and treated water, each with a capacity of 5,000 m3, allows for adjusting consumption needs and ensuring greater operational flexibility of the plant.


  • High-quality drinking water in sufficient quantity 365 days a year.
  • A treatment process adapted to sanitary safety requirements and the characteristics of resources (river water)
  • A high reliability in treating peak turbidity and pathogenic microorganisms. From the water intakes of Pont du Diable, Edgar Avril, Hirondelles, and Bras de la Plaine.
  • The provision of emergency water supply in case of crisis through two reservoirs of 5,000 m3 each for raw and treated water.
  • An installation compliant with European standards.
inhabitants served in
drinking water
Two reservoirs of
5,000 m3
to adjust consumption needs

Other achievements

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