BALLENSVEYRON Wastewater Treatment Plant, Ballens, Vaud, Switzerland

BALLENSVEYRON is an advanced wastewater treatment plant located in Ballens, within the District of Morges in the canton of Vaud, Switzerland. The facility serves a population of approximately 1,047 residents, making it a small-scale municipal treatment operation in the Swiss Jura foothills. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 1,750 m³/day and an average discharge volume of 475.26 m³/day, the plant operates well below its maximum capacity, indicating room for future growth. Swiss wastewater treatment plants are regulated under the Swiss Water Protection Act (Gewässerschutzgesetz), which mandates high treatment standards to protect sensitive water bodies. The treated effluent from BALLENSVEYRON is discharged into local waterways that eventually drain into the Rhone River basin via the Aubonne River. The Rhone flows into Lake Geneva (Lac Léman) and continues through France to the Mediterranean Sea. The plant plays a key role in protecting the region's aquatic ecosystems, including the ecologically sensitive Lake Geneva shoreline.

The plant's discharge enters the Aubonne River, a tributary of the Rhone River system. The Rhone flows into Lake Geneva, one of the largest freshwater lakes in Europe, which supports diverse aquatic life and serves as a critical water resource for the region. Downstream, the Rhone continues through France to the Mediterranean Sea. The advanced treatment at BALLENSVEYRON helps minimize nutrient loading and protects the lake's water quality.