Mutrux Wastewater Treatment Plant, Vaud, Switzerland | Small Community Secondary Treatment

Mutrux wastewater treatment plant is a small municipal facility located in the village of Mutrux, within the Jura-Nord vaudois district of Vaud, Switzerland. The plant serves a population of 121 and operates under Swiss water protection regulations, which require appropriate treatment for small agglomerations. The plant provides secondary treatment, meeting the standard required for small communities under Swiss law. With a designed capacity of 283 m³/day and an actual discharge volume of 54.93 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into Lake Neuchâtel via the Arnon River. Lake Neuchâtel is the largest lake entirely within Switzerland and supports diverse aquatic life, including several fish species. The plant's secondary treatment helps protect this sensitive lake ecosystem from nutrient pollution.

The plant discharges into the Arnon River, which flows into Lake Neuchâtel, a large freshwater lake in western Switzerland. Lake Neuchâtel is ecologically significant, supporting diverse fish populations and migratory birds. The secondary treatment provided by the plant reduces organic load and nutrients, helping to prevent eutrophication in the lake and maintain water quality for downstream communities and ecosystems.