AGIEZ Wastewater Treatment Plant, Agiez, Vaud, Switzerland

AGIEZ is a wastewater treatment plant located in the village of Agiez, within the Jura-Nord vaudois district of Vaud, Switzerland. Serving a small population of 214 residents, the plant is part of the local municipal infrastructure managed under Swiss water protection regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by Swiss law for smaller agglomerations. With a designed capacity of 500 m³/day and a current discharge volume of 97.14 m³/day, the facility operates well below its maximum capacity, indicating room for future growth or seasonal variations. The treated effluent from AGIEZ ultimately drains into the Orbe River, a tributary of the Thièle, which flows into Lake Neuchâtel. This lake is part of the larger Rhine basin and supports diverse aquatic life, including several fish species. The advanced treatment helps protect the local watershed and downstream ecosystems from nutrient pollution.

AGIEZ discharges into the Orbe River, which flows into the Thièle River and then into Lake Neuchâtel, one of the largest lakes in Switzerland. The lake is ecologically sensitive, supporting diverse aquatic life and serving as an important migratory corridor for fish. The advanced treatment level helps minimize nutrient loading, protecting water quality in the lake and downstream in the Rhine basin.