Overview
Calvisson Chef Lieu is an advanced wastewater treatment plant in Calvisson, Occitanie, France, serving approximately 4,870 people. It discharges treated water inland, supporting local water quality.
Calvisson Chef Lieu is an advanced wastewater treatment plant located in Calvisson, a commune in the Gard department of Occitanie, southern France. The plant serves a population of around 4,870, classifying it as a small to medium agglomeration under French regulations. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 8,500 cubic meters per day and a discharge volume of 868.8 cubic meters per day, the plant operates well within its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), advanced treatment is typically required for discharges into sensitive areas, though the plant's inland location suggests it may be protecting a sensitive receiving environment. The treated effluent is discharged into local watercourses that ultimately drain into the Mediterranean Sea via the Vidourle or Rhône river systems. The plant plays a key role in preserving water quality in the region, supporting aquatic life and downstream ecosystems in the Camargue delta and coastal lagoons.
Environmental context
The plant discharges into local streams that flow toward the Mediterranean Sea, likely contributing to the Rhône or Vidourle basins. The downstream environment includes ecologically sensitive wetlands and coastal areas that support diverse aquatic life and migratory birds. Advanced treatment helps minimize nutrient loading, protecting these habitats from eutrophication.
Frequently asked questions
The plant is located at D 1, Le Lorieux, Calvisson, in the Gard department of Occitanie, southern France.
The plant serves approximately 4,870 people, classifying it as a small to medium agglomeration under French and EU regulations.
The plant provides advanced treatment, which includes nutrient removal beyond secondary treatment, often required for sensitive receiving environments.
As a French plant serving fewer than 10,000 people, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum. The advanced treatment here suggests it may be in a sensitive area requiring higher standards.
The plant has a designed capacity of 8,500 cubic meters per day, with a current discharge volume of 868.8 cubic meters per day, indicating ample reserve capacity.
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