Overview
Dieulefit Le Poet Laval is a secondary wastewater treatment plant in Souspierre, Auvergne-Rhône-Alpes, France, serving about 4,733 people. It discharges 844 m³/day of treated effluent into the local watershed.
Dieulefit Le Poet Laval is a municipal wastewater treatment plant located in Souspierre, within the Drôme department of the Auvergne-Rhône-Alpes region in southeastern France. The plant serves a population of approximately 4,733, placing it in the small-to-medium agglomeration category under French regulations. The facility provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for inland plants serving between 2,000 and 10,000 population equivalents. The plant has a designed capacity of 3,600 m³/day and currently discharges an average of 844 m³/day of treated wastewater, indicating operational headroom. The treated effluent is released into the local river system, which ultimately drains into the Rhône River basin and then the Mediterranean Sea. The plant plays a key role in protecting the water quality of the Drôme River and its tributaries, supporting aquatic life and downstream uses.
Environmental context
The plant discharges into the Drôme River watershed, a tributary of the Rhône River. The Drôme is known for its diverse aquatic ecosystems and supports species such as the European eel and various freshwater fish. The Rhône River flows into the Mediterranean Sea, a semi-enclosed sea with sensitive marine habitats. Proper treatment at this plant helps reduce nutrient and pollutant loads, safeguarding both freshwater and coastal environments.
Frequently asked questions
The plant is located on Route de Dieulefit in Souspierre, within the Drôme department of the Auvergne-Rhône-Alpes region in southeastern France.
The plant serves approximately 4,733 people, classifying it as a small-to-medium agglomeration under EU and French wastewater regulations.
The treated effluent is discharged into the local river system, which flows into the Drôme River, a tributary of the Rhône River, ultimately reaching the Mediterranean Sea.
The plant provides secondary treatment, meeting the EU Urban Waste Water Treatment Directive requirement for inland plants serving between 2,000 and 10,000 population equivalents.
The plant has a designed capacity of 3,600 m³ per day, with an average daily discharge of 844 m³, indicating it operates well below its maximum capacity.
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