LE LANDERON Wastewater Treatment Plant, Le Landeron, Neuchâtel, Switzerland

LE LANDERON is a wastewater treatment plant located at 6 Rue du Port in Le Landeron, a municipality in the canton of Neuchâtel, Switzerland. The plant serves a population of about 13,141 people, placing it in the medium agglomeration category under Swiss water protection standards. Switzerland's Water Protection Act (GSchG) and its ordinances set stringent requirements for wastewater treatment. Plants of this scale are typically required to implement biological treatment with nutrient removal, especially in sensitive catchment areas like the Lake Biel region. The plant's operations are overseen by cantonal authorities to ensure compliance with federal discharge limits. The treated effluent from LE LANDERON is discharged into the local water system, which ultimately drains into Lake Biel (Bielersee), a large lake connected to the Aare River system. This water body supports diverse aquatic life and is used for recreation and drinking water, making effective treatment essential for protecting downstream ecosystems and water quality.

The plant's discharge flows into the local drainage network that feeds Lake Biel (Bielersee), a major lake in the Swiss Plateau. Lake Biel is part of the Aare River basin, which eventually drains into the Rhine River and the North Sea. The lake supports a variety of fish species and is an important habitat for waterbirds. Protecting this water body from nutrient pollution is critical to maintaining its ecological health and recreational value.