GRANGES PRES MARNAND Wastewater Treatment Plant, Valbroye, Vaud, Switzerland

GRANGES PRES MARNAND is an advanced wastewater treatment plant located in Valbroye, within the District de la Broye-Vully in the canton of Vaud, Switzerland. The plant serves a population of approximately 2,022 and is part of the municipal infrastructure for the local community. The facility operates with advanced treatment processes, ensuring high-quality effluent. With a designed capacity of 3,378 m³/day and an average discharge volume of 917.83 m³/day, the plant is well-sized for its service area. Swiss wastewater treatment plants are regulated under national water protection legislation, which mandates stringent standards for effluent quality, particularly in sensitive areas. The treated wastewater is discharged into local watercourses that ultimately drain into the Broye River and then into Lake Neuchâtel, part of the Rhine basin. The plant plays a key role in protecting the aquatic environment of the region, supporting biodiversity and water quality in downstream ecosystems.

The plant discharges into the Broye River catchment, which flows into Lake Neuchâtel, one of the largest lakes in Switzerland. This lake is part of the Rhine basin and supports diverse aquatic life, including fish species such as perch and whitefish. The advanced treatment ensures minimal nutrient and pollutant loading, helping to maintain the ecological balance of the lake and downstream waters.