Overview
STEP ST URSANNE is a secondary treatment plant in Clos du Doubs, Switzerland, serving 1,576 people. It discharges 715.38 m³/day of treated wastewater into the local watershed.
STEP ST URSANNE is a municipal wastewater treatment plant located in Clos du Doubs, in the Jura canton of Switzerland. It serves a population of approximately 1,576 residents, classifying it as a small agglomeration under Swiss and EU regulatory frameworks. The plant is situated near the border with France, in the Doubs River valley. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Switzerland, while not an EU member, aligns its water protection legislation with EU standards under the Swiss Water Protection Act. The plant has a designed capacity of 2,633 m³/day and currently treats an average daily flow of 715.38 m³/day, indicating ample reserve capacity. Treated effluent from STEP ST URSANNE is discharged into the Doubs River, a tributary of the Saône, which flows into the Rhône and eventually reaches the Mediterranean Sea. The Doubs River supports diverse aquatic life and is an important ecological corridor in the Jura region. The plant's operation helps protect water quality in this transboundary river system.
Environmental context
The plant discharges into the Doubs River, which flows through the Jura region into France, joining the Saône River and then the Rhône before reaching the Mediterranean Sea. The Doubs River supports a diverse aquatic ecosystem, including fish species such as brown trout and grayling, and is an important migratory corridor. The plant's secondary treatment helps maintain water quality in this ecologically sensitive river system.
Frequently asked questions
STEP ST URSANNE is located in Clos du Doubs, in the canton of Jura, Switzerland, near the border with France.
The plant serves approximately 1,576 residents, classifying it as a small agglomeration under Swiss and EU wastewater directives.
The plant discharges treated effluent into the Doubs River, which flows into the Saône and Rhône rivers, ultimately reaching the Mediterranean Sea.
STEP ST URSANNE provides secondary treatment, which is the standard required for freshwater discharges from small agglomerations under the EU Urban Waste Water Treatment Directive.
Switzerland's Water Protection Act mandates secondary treatment for plants of this scale. The plant aligns with EU standards, ensuring protection of the Doubs River and downstream ecosystems.
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