SALENCY Wastewater Treatment Plant, Morlincourt, Hauts-de-France

The SALENCY wastewater treatment plant is located in Morlincourt, a commune in the Oise department of Hauts-de-France, France. It serves a population of 1,560 and operates with advanced treatment, reflecting the country's commitment to high environmental standards for smaller agglomerations. As an advanced treatment facility, SALENCY likely employs processes such as biological nutrient removal or tertiary filtration to meet stringent effluent quality requirements. Its designed capacity of 2,000 m³/day and current discharge volume of 278.30 m³/day indicate ample reserve capacity. The plant operates under France's transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment for agglomerations of this size. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Oise River, a major tributary of the Seine. The Seine River flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and providing water for agriculture, industry, and recreation. Advanced treatment helps protect these downstream environments from nutrient pollution and other contaminants.

The SALENCY plant discharges into the Oise River basin, which flows into the Seine River and then the English Channel. This watershed supports diverse aquatic life, including fish species like pike and perch, and provides critical habitat for migratory birds. Advanced treatment reduces nutrient loads, helping to prevent eutrophication in downstream water bodies and the coastal zone.