Overview
SAINT JULIEN EN GENEVOIS wastewater treatment plant serves Vernier, Geneva, Switzerland. It treats wastewater for approximately 31,667 people under Swiss federal water protection regulations.
The SAINT JULIEN EN GENEVOIS wastewater treatment plant is located in Vernier, within the canton of Geneva, Switzerland. It serves a population of around 31,667, placing it in the medium agglomeration category under Swiss water protection legislation. Swiss wastewater treatment plants are regulated by the Federal Water Protection Act (GSchG) and the Water Protection Ordinance (GSchV), which mandate advanced treatment for plants of this scale. The plant's designed capacity is 1.00 unit, and it operates within a stringent regulatory framework that requires nutrient removal to protect sensitive water bodies. The plant discharges treated effluent into the local watershed, which ultimately drains into the Rhone River and then into Lake Geneva (Lac Léman). This water body is ecologically significant, supporting diverse aquatic life and serving as a major drinking water reservoir for the region. The plant plays a key role in maintaining water quality in this sensitive alpine lake ecosystem.
Environmental context
The plant's treated effluent flows into the local watercourse, which is part of the Rhone River basin. The Rhone drains into Lake Geneva, a large alpine lake that supports diverse aquatic life and provides drinking water for millions. Downstream, the Rhone continues through France to the Mediterranean Sea. The lake is sensitive to nutrient pollution, making advanced treatment essential for protecting its ecological health.
Frequently asked questions
The plant is located at Chemin de la Verseuse, Vernier, in the canton of Geneva, Switzerland.
The plant serves approximately 31,667 people, classifying it as a medium-sized agglomeration under Swiss regulations.
The plant discharges into the local watershed that feeds the Rhone River, which flows into Lake Geneva and eventually the Mediterranean Sea.
The plant operates under the Swiss Federal Water Protection Act (GSchG) and Water Protection Ordinance (GSchV), which require advanced treatment for plants serving over 10,000 people to protect sensitive water bodies like Lake Geneva.
Swiss regulations mandate tertiary treatment with nutrient removal (nitrogen and phosphorus) for plants of this scale to prevent eutrophication in receiving waters.
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