Saint-Trivier-de-Courtes Chef lieu Wastewater Treatment Plant, Auvergne-Rhône-Alpes

The Saint-Trivier-de-Courtes Chef lieu wastewater treatment plant is located in the commune of Saint-Trivier-de-Courtes in the Ain department of Auvergne-Rhône-Alpes, France. It serves a population of approximately 4,100 residents, classifying it as a small to medium agglomeration under French regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive for agglomerations of this size. With a design capacity of 6,800 m³/day and an average daily discharge volume of 731 m³, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Rhône River basin. The plant's advanced treatment helps protect downstream water quality in the Rhône and its tributaries, supporting aquatic ecosystems and downstream uses such as agriculture and recreation.

The plant discharges into a local watercourse that flows into the Rhône River basin, a major European river system. The Rhône drains into the Mediterranean Sea, supporting diverse aquatic life and important migratory fish species. Advanced treatment at this plant reduces nutrient loads and pollutants, helping to maintain water quality in the downstream environment.