AUBONNE Wastewater Treatment Plant, Aubonne, Vaud, Switzerland

The AUBONNE wastewater treatment plant is located in Aubonne, within the canton of Vaud, Switzerland. It serves a population of approximately 4,883 residents, making it a small-scale municipal facility. The plant is situated near the coast, within 50 km of the shoreline, and operates under Swiss water protection regulations. As a Swiss wastewater treatment facility, AUBONNE is subject to the Swiss Water Protection Act (Gewässerschutzgesetz), which requires appropriate treatment based on the sensitivity of the receiving water body. For small agglomerations like Aubonne, secondary treatment is typically mandated to ensure compliance with national standards. The plant's designed capacity is 1.00 volume unit, indicating its scale relative to the population served. The treated effluent from AUBONNE is discharged into the local watershed, which ultimately drains into Lake Geneva (Lac Léman) and then via the Rhône River to the Mediterranean Sea. This connection to a major European river system underscores the plant's role in protecting downstream aquatic ecosystems and the broader regional water quality.

The AUBONNE plant discharges into the Aubonne River, a tributary of the Rhône basin that flows into Lake Geneva. Lake Geneva is a large, deep alpine lake with significant ecological value, supporting diverse fish species and serving as a critical water resource. The Rhône River then carries the water to the Mediterranean Sea, making the plant's treatment performance important for both local lake health and downstream marine environments.