LAUSANNE Wastewater Treatment Plant, Lausanne, Vaud, Switzerland

The LAUSANNE wastewater treatment plant is a major municipal facility serving the city of Lausanne in the canton of Vaud, Switzerland. With a population served of approximately 176,928, it is classified as a large agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD), which Switzerland aligns with through bilateral agreements. The plant is situated near the shores of Lake Geneva, one of the largest freshwater lakes in Western Europe. Swiss wastewater treatment standards typically require advanced treatment, including nutrient removal, for plants discharging into sensitive water bodies like Lake Geneva. The plant's designed capacity is 1.00 (likely in cubic meters per second or similar unit), indicating a substantial infrastructure. As a large agglomeration, it is expected to meet stringent effluent quality standards to protect the lake's ecosystem. The treated effluent from the LAUSANNE plant discharges into Lake Geneva, which drains via the Rhone River into the Mediterranean Sea. Lake Geneva is a critical freshwater resource for drinking water, recreation, and biodiversity. The plant plays a vital role in preventing eutrophication and maintaining water quality in this ecologically sensitive alpine lake, which supports diverse aquatic life and is a key migratory corridor for fish species.

The LAUSANNE plant discharges into Lake Geneva, a large alpine lake that flows into the Rhone River and ultimately the Mediterranean Sea. Lake Geneva is ecologically sensitive, supporting diverse aquatic life and serving as a critical habitat for fish species such as Arctic char and whitefish. The plant's advanced treatment helps control nutrient loading, preventing algal blooms and preserving water quality for downstream ecosystems.