FONTENAY LE MARMION Wastewater Treatment Plant, Laize-Clinchamps, Normandy

The FONTENAY LE MARMION wastewater treatment plant is located in Laize-Clinchamps, within the Normandy region of France. It serves a population of approximately 3,808 residents, classifying it as a small agglomeration under French and EU regulations. The plant is situated inland, more than 10 km from the coast, and its operations are part of the municipal wastewater infrastructure for the area. This facility employs advanced treatment processes, which exceed the EU Urban Waste Water Treatment Directive's minimum requirement of secondary treatment for agglomerations of this size. The plant has a designed capacity of 6,500 m³/day and currently discharges an average volume of 679.34 m³/day, indicating significant spare capacity. As a French facility, it operates under national regulations that transpose the EU directive, with permits issued by the relevant local authorities. The treated effluent is discharged into local watercourses that ultimately drain into the English Channel via the Orne River basin. The receiving water body supports diverse aquatic life and contributes to the ecological health of the downstream estuary and coastal zone. Advanced treatment helps protect these waters from nutrient pollution and other contaminants, supporting both local biodiversity and regional water quality.

The plant discharges into the Laize River, a tributary of the Orne River, which flows northward through Caen and into the English Channel at Ouistreham. The Orne estuary is an ecologically sensitive area that supports migratory fish species and diverse birdlife. Advanced treatment at this plant helps reduce nutrient loads that could otherwise contribute to eutrophication in the coastal zone.