SAINT AMBROIX Wastewater Treatment Plant, Saint-Ambroix, Occitanie, France

The SAINT AMBROIX wastewater treatment plant is located in Saint-Ambroix, a commune in the Gard department of Occitanie, southern France. It serves a population of approximately 3,966, classifying it as a small to medium agglomeration under French and EU regulations. The plant is situated inland, away from coastal areas, and treats wastewater from the local community. The facility employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 6,500 m³/day and an actual discharge volume of 707.53 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treatment level ensures high-quality effluent suitable for discharge into sensitive environments. The treated effluent is discharged into a local watercourse that eventually flows into the Cèze River, a tributary of the Rhône. The Rhône River drains into the Mediterranean Sea. The plant plays a key role in protecting the Cèze watershed, which supports diverse aquatic life and is used for recreation and agriculture. Advanced treatment helps minimize nutrient and pollutant loads, safeguarding downstream ecosystems.

The plant discharges into a tributary of the Cèze River, which flows into the Rhône River and ultimately reaches the Mediterranean Sea. The Cèze watershed is ecologically sensitive, supporting diverse aquatic species and providing habitat for migratory fish. Advanced treatment reduces the risk of eutrophication and protects water quality in this important river system.