GAJAN Wastewater Treatment Plant, Gajan, Occitanie, France

The GAJAN wastewater treatment plant is located in Gajan, a commune in the Gard department of Occitanie, southern France. It serves a population of approximately 4,361 residents, classifying it as a small to medium agglomeration under French and EU regulations. The plant is situated near Nîmes, within the Rhône-Mediterranean basin. 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 3,500 m³/day and an actual discharge volume of 777.99 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Mediterranean Sea via the Rhône River system. The plant's advanced treatment helps protect sensitive downstream environments, including coastal lagoons and marine habitats, by reducing nutrient loads and pollutants.

The GAJAN plant discharges into the local watershed within the Gard department, part of the larger Rhône-Mediterranean basin. Treated water flows through small streams and rivers, eventually reaching the Mediterranean Sea. This coastal region supports diverse aquatic life and includes ecologically sensitive areas such as the Camargue delta, a major wetland for migratory birds. Advanced treatment at GAJAN helps minimize nutrient enrichment and protects downstream water quality.