La Cerlangue Wastewater Treatment Plant, Normandy, France

La Cerlangue wastewater treatment plant is located in the commune of La Cerlangue, in the Normandy region of northern France. The facility serves a population of approximately 850 residents and operates under the French regulatory framework, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC). As a small agglomeration, the plant is required to provide appropriate treatment to protect the local environment. The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. With a designed capacity of 2300 m³/day and an actual discharge volume of 151.64 m³/day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The plant's treatment level exceeds the EU minimum requirement of secondary treatment for agglomerations of this size. The treated effluent is discharged into the local watershed, which ultimately drains into the Seine River estuary and the English Channel. The Normandy coast is ecologically sensitive, supporting diverse marine life and important bird habitats. The plant's advanced treatment helps minimize nutrient and pollutant loads, protecting downstream water quality and the coastal ecosystem.

The plant discharges into the Seine River basin, which flows through Normandy into the English Channel. The Seine estuary is a critical habitat for migratory fish such as salmon and eels, and supports a variety of bird species. The coastal waters of the English Channel are influenced by strong tides and are important for fisheries and marine biodiversity. Advanced treatment at this plant helps reduce the risk of eutrophication and protects the sensitive estuarine and marine environments.