ST GEORGE Wastewater Treatment Plant, Saint-George, Vaud, Switzerland

ST GEORGE is a wastewater treatment plant located in Saint-George, in the District of Nyon, Vaud, Switzerland. It serves a small population of 643 residents and is situated near the coast of Lake Geneva, within 10 km of the shoreline. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 1075 m³/day and a current discharge volume of 291.87 m³/day, the plant operates well below its capacity. Under Swiss regulations, which align with the EU Urban Waste Water Treatment Directive, advanced treatment is required for sensitive areas like Lake Geneva. The treated effluent is discharged into the local watershed, which drains into Lake Geneva, a major Alpine lake that flows into the Rhône River and eventually to the Mediterranean Sea. The plant plays a key role in protecting the lake's water quality and supporting its diverse aquatic ecosystem.

The plant discharges into the Lake Geneva watershed, which is part of the Rhône River basin. Lake Geneva is a large, deep Alpine lake that supports diverse aquatic life and is a critical drinking water source for the region. The Rhône River flows from the lake through France to the Mediterranean Sea, making the plant's advanced treatment essential for protecting downstream water quality and ecological health.