ETALANS Wastewater Treatment Plant, Étalans, Bourgogne-Franche-Comté

The ETALANS wastewater treatment plant is located in Étalans, a commune in the Doubs department of Bourgogne-Franche-Comté, France. Serving a population of 4,600, this facility is part of the region's municipal wastewater infrastructure, handling domestic sewage from the local community. The plant employs advanced treatment processes, exceeding the minimum secondary treatment requirements under the EU Urban Waste Water Treatment Directive (91/271/EEC). With a designed capacity of 2,940 m³/day and an average daily discharge of 820.63 m³, the plant operates well within its capacity, ensuring effective treatment of wastewater before release. Treated effluent from ETALANS is discharged into the local watershed, which ultimately drains into the Doubs River, a tributary of the Saône, and then into the Rhône River before reaching the Mediterranean Sea. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports water quality in this sensitive river basin.

The ETALANS plant discharges into the Doubs River basin, part of the larger Rhône-Mediterranean watershed. The Doubs River flows through the Jura Mountains and supports diverse aquatic life, including fish species such as brown trout and grayling. Downstream, the river joins the Saône, which flows into the Rhône and eventually the Mediterranean Sea. The plant's advanced treatment helps minimize nutrient and pollutant loads, protecting the ecological health of these water bodies.