CHABREY Wastewater Treatment Plant, Vully-les-Lacs, Vaud, Switzerland

CHABREY is a wastewater treatment plant located in the village of Chabrey, part of the municipality of Vully-les-Lacs in the canton of Vaud, Switzerland. The plant serves a small population of 142 residents, reflecting its role in a rural lakeside community. It is situated near the shores of Lake Neuchâtel, one of the largest lakes in Switzerland. The plant provides secondary treatment, which is the standard biological treatment level required under Swiss water protection regulations. Swiss law, aligned with the EU Urban Waste Water Treatment Directive, mandates secondary treatment for agglomerations of this size. The plant's design capacity of 333.00 m³/day indicates it has reserve capacity for future growth or seasonal peaks, with an actual discharge volume of 64.46 m³/day. The treated effluent is discharged into the local watershed, which drains into Lake Neuchâtel. This lake is part of the larger Rhine basin, eventually flowing into the North Sea. The plant plays a key role in protecting the lake's water quality, which supports diverse aquatic life and recreational activities. Its operation helps prevent nutrient pollution and maintains the ecological health of the region.

CHABREY discharges into the local watershed that flows into Lake Neuchâtel, a large freshwater lake in western Switzerland. The lake is part of the Rhine basin, with its outflow via the Zihl Canal into the Aare River and ultimately the North Sea. The lake supports diverse aquatic ecosystems, including fish species such as perch and pike, and is an important migratory corridor for birds. Protecting water quality through effective treatment is essential to prevent eutrophication and maintain the lake's ecological balance.