Lüsslingen Wastewater Treatment Plant, Solothurn, Switzerland

The Lüsslingen wastewater treatment plant is located in the municipality of Lüsslingen-Nennigkofen, within the Bezirk Bucheggberg of Solothurn canton, Switzerland. It serves a population of 628 residents, making it a small-scale municipal facility. The plant provides secondary treatment, which is the standard biological treatment required under Swiss water protection regulations. With a designed capacity of 1,800 cubic meters per day and a current discharge volume of 285 cubic meters per day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Aare River, a major tributary of the Rhine. The Rhine basin supports diverse aquatic ecosystems and is a critical waterway for several European countries. The plant's secondary treatment helps protect downstream water quality in this sensitive river system.

The plant discharges into the Aare River basin, which flows into the Rhine River and eventually reaches the North Sea. The Rhine is a major European waterway supporting diverse aquatic life, including migratory fish species. Secondary treatment reduces organic pollutants and suspended solids, helping to maintain water quality in this ecologically important river system.