REBAIS Wastewater Treatment Plant, Rebais, Île-de-France

The REBAIS wastewater treatment plant is located in the commune of Rebais, within the Seine-et-Marne department of Île-de-France, France. It serves a population of approximately 1,290 residents, classifying it as a small agglomeration under French and EU regulations. The plant is situated in a rural setting, contributing to the local sanitation infrastructure. The facility employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. With a designed capacity of 3,000 m³/day and an average daily flow of 230.13 m³, the plant operates well below its capacity, indicating room for future growth. As a French plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum for agglomerations of this size, but the plant exceeds this requirement with advanced treatment. The treated effluent is discharged into the local watershed, which ultimately drains into the Seine River basin and then into the English Channel. The plant plays a key role in protecting the water quality of local streams and the downstream Seine ecosystem, supporting aquatic life and recreational uses.

The REBAIS plant discharges into the local hydrographic network, which feeds into the Grand Morin River, a tributary of the Marne River, which in turn flows into the Seine River. The Seine River basin is ecologically significant, supporting diverse aquatic species and providing water for agriculture and drinking water downstream. The advanced treatment at REBAIS helps reduce nutrient and pollutant loads, protecting the sensitive freshwater ecosystems of the Seine watershed.