CLERES Wastewater Treatment Plant, Clères, Normandy, France

CLERES is a wastewater treatment plant located in Clères, a commune in the Seine-Maritime department of Normandy, France. The plant serves a small population of approximately 700 people and is situated in the rural landscape of the region. It operates under the French regulatory framework, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this scale. The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. With a designed capacity of 1500 m³/day and an actual discharge volume of 124.88 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treatment level exceeds the EU requirement for secondary treatment for small agglomerations. The treated effluent is discharged into local watercourses that eventually drain into the Seine River basin, which flows into the English Channel. The plant plays a crucial role in protecting the local aquatic environment and downstream ecosystems, including the Seine estuary, a vital ecological area for migratory birds and fish species.

The CLERES plant discharges into local streams that feed into the Seine River, which flows through Normandy and into the English Channel. The Seine estuary is a critical habitat for diverse aquatic life and supports important migratory bird populations. The advanced treatment helps maintain water quality in this sensitive downstream environment, reducing nutrient loading and protecting the ecological balance of the river and coastal waters.