MAMIROLLE Wastewater Treatment Plant, Mamirolle, Bourgogne-Franche-Comté

The MAMIROLLE wastewater treatment plant is located in the commune of Mamirolle, within the Doubs department of Bourgogne-Franche-Comté, France. It serves a population of approximately 2,800 residents, classifying it as a small agglomeration under French and EU regulations. The plant operates with secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into freshwater bodies. Its designed capacity is 3,000 m³/day, and the current discharge volume is about 500 m³/day, indicating ample reserve capacity. The treated effluent is discharged into local waterways that ultimately drain into the Doubs River, a tributary of the Saône, which flows into the Rhône and reaches the Mediterranean Sea. The plant plays a key role in protecting the local aquatic ecosystem and downstream water quality.

The plant discharges into the Doubs River basin, which flows through the Jura region and joins the Saône River. The Saône then meets the Rhône, which empties into the Mediterranean Sea. This watershed supports diverse aquatic life and is important for regional biodiversity. The secondary treatment helps reduce organic pollution and protect the river's ecological health.