LESSAY Wastewater Treatment Plant, Lessay, Normandie, France

LESSAY is a wastewater treatment plant located in Lessay, a commune in the Manche department of Normandie, France. The plant serves a population of approximately 2,850 and is situated near the Atlantic coast, within 10 km of the shoreline. It is part of the municipal infrastructure managed by the local authorities. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 5,000 m³/day and a current discharge volume of 508.44 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the English Channel. The coastal environment supports diverse marine life and is an important area for migratory birds and fisheries. The plant's advanced treatment helps protect the sensitive coastal ecosystem from nutrient pollution and other contaminants.

The plant discharges into the local river system that flows into the English Channel near the Cotentin Peninsula. This coastal area is ecologically sensitive, supporting diverse marine habitats, including seagrass beds and shellfish populations. The advanced treatment level helps minimize nutrient loading and protects water quality in the downstream coastal zone.