POULX Wastewater Treatment Plant, Poulx, Occitanie, France

The POULX wastewater treatment plant is located in the commune of Poulx, near Nîmes in the Occitanie region of southern France. It serves a population of approximately 2,280 residents, classifying it as a small agglomeration under French and EU regulations. The plant is situated along Route d'Uzès, in the La Boissière area, and operates as part of the municipal wastewater infrastructure for the Gard department. The facility employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 5,000 m³/day and an average discharge volume of 406.75 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. As an advanced treatment plant, it likely incorporates nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The treated effluent is discharged into the local watershed, which ultimately drains into the Rhône River via the Gardon or Vistre rivers. The Rhône flows into the Mediterranean Sea near the Camargue delta, a region of high ecological importance. The advanced treatment helps minimize nutrient loading and protects downstream aquatic ecosystems, including the Camargue wetlands, which are a critical habitat for migratory birds and diverse species.

The plant discharges into the local drainage basin that feeds the Gardon or Vistre rivers, tributaries of the Rhône River. The Rhône flows into the Mediterranean Sea via the Camargue delta, an ecologically sensitive area known for its wetlands and biodiversity. Advanced treatment at this plant reduces nutrient pollution, helping to protect the downstream aquatic environment from eutrophication and supporting the health of the Rhône delta ecosystem.