Vallorbe Wastewater Treatment Plant: Serving the Swiss Municipality of Vallorbe

The Vallorbe wastewater treatment plant is located in the municipality of Vallorbe, within the District du Jura-Nord vaudois in the canton of Vaud, Switzerland. The facility serves a population of approximately 2,682 residents, making it a small-scale municipal treatment plant in the Swiss Jura region. Switzerland's water protection legislation, particularly the Federal Water Protection Act (GSchG) and the Water Protection Ordinance (GSchV), requires all wastewater to be treated to a high standard. For small agglomerations like Vallorbe, secondary treatment with nutrient removal is typically mandated to protect sensitive receiving waters. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day or similar unit), indicating it is sized for the local community. The treated effluent from the plant is discharged into a local watercourse that ultimately flows into the Orbe River, a tributary of the Rhone basin. The Rhone River drains into Lake Geneva and eventually the Mediterranean Sea. The plant plays a key role in maintaining water quality in the Orbe River, which supports diverse aquatic life and is part of a region known for its natural springs and groundwater resources.

The Vallorbe plant discharges into a local stream that feeds the Orbe River, a tributary of the Rhone basin. The Orbe River flows through the Jura region and eventually reaches Lake Geneva, a large alpine lake with significant ecological and recreational value. Downstream, the Rhone River carries water to the Mediterranean Sea. The plant's operations help protect the sensitive karst groundwater systems and surface waters in the Jura, which are important for drinking water supply and aquatic biodiversity.