Pont-a-Mousson Wastewater Treatment Plant, Grand Est, France

The Pont-a-Mousson wastewater treatment plant is located in the Grand Est region of France, serving the commune of Pont-a-Mousson and surrounding areas. With a population equivalent of 32,800, it is classified as a medium-sized agglomeration under European Union regulations. As a French facility, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The directive also requires appropriate treatment before discharge into sensitive areas, which may include nutrient removal if the receiving water body is designated as sensitive. The plant discharges treated effluent into the Moselle River, a major tributary of the Rhine. The Moselle flows through the Lorraine region and ultimately joins the Rhine near Koblenz, Germany. The Rhine basin is one of Europe's most important ecological and economic waterways, supporting diverse aquatic life and serving as a critical migratory corridor for fish species.

The plant discharges into the Moselle River, which flows through the Grand Est region and joins the Rhine River. The Rhine basin supports a rich ecosystem, including migratory fish such as salmon and eel. The Moselle is also used for navigation and recreation, making water quality management essential for both ecological and human uses.