LAMBOINGSELD Wastewater Treatment Plant, Plateau de Diesse, Switzerland

LAMBOINGSELD is a wastewater treatment plant located in Lamboing, part of the municipality of Plateau de Diesse in the Bern/Jura bernois region of Switzerland. The plant serves a population of approximately 1,100 people, reflecting its role in a small rural community within the Swiss Jura mountains. The facility employs advanced treatment processes, which go beyond the secondary treatment standard required by Swiss regulations for smaller agglomerations. With a designed capacity of 1,700 m³ per day and an average daily discharge of 499.31 m³, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Aare River basin, a major tributary of the Rhine. The plant's advanced treatment helps protect the sensitive aquatic ecosystems of the Jura region, which support diverse freshwater species and contribute to the overall health of the Rhine watershed.

The plant discharges into small streams in the Jura bernois region, which flow into the Suze River and then into Lake Biel (Bielersee), a large mesotrophic lake. From Lake Biel, water continues via the Aare River to the Rhine. The Jura region is ecologically sensitive, with karst landscapes and groundwater-dependent ecosystems. Advanced treatment at this plant helps minimize nutrient loading, protecting Lake Biel from eutrophication and preserving its role as a drinking water reservoir and recreational area.