FORBACH MARIENAU Wastewater Treatment Plant, Forbach, Grand Est, France

FORBACH MARIENAU is a wastewater treatment plant located in Marienau, Forbach, in the Grand Est region of France. The plant serves a population of approximately 63,200, classifying it as a medium-to-large agglomeration under EU regulations. It is situated inland, away from coastal areas, and discharges into the local watershed. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving water body is designated as sensitive. The regulatory framework ensures compliance with European standards for wastewater treatment. The treated effluent from FORBACH MARIENAU is discharged into the Rosselle River, a tributary of the Saar, which flows into the Moselle and ultimately the Rhine. The Rhine basin is a major European waterway supporting diverse aquatic life and providing water for agriculture and industry. The plant plays a key role in protecting this downstream ecosystem from nutrient pollution and organic contaminants.

FORBACH MARIENAU discharges into the Rosselle River, which joins the Saar, then the Moselle, and finally the Rhine River. The Rhine basin is a critical ecological corridor in Europe, supporting diverse fish species and migratory birds. The plant's operations help reduce nutrient loading and organic pollution, safeguarding water quality in this internationally important river system.