Ailly-sur-Noye Wastewater Treatment Plant, Hauts-de-France

The Ailly-sur-Noye wastewater treatment plant is located in the commune of Ailly-sur-Noye, within the Somme department of Hauts-de-France, France. It serves a population of 4,524 residents and is situated in the Parc d'Activités du Val de Noye, an industrial park along the Rue de Boves. The plant is part of the municipal wastewater infrastructure for the local community. The facility provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent between 2,000 and 10,000. The plant has a designed capacity of 3,783 m³/day and currently discharges an average volume of 807.07 m³/day, indicating it operates well below its maximum capacity. The treated effluent is discharged into the local watershed, which ultimately drains into the Noye River, a tributary of the Avre, and then into the Somme River. The Somme River flows into the English Channel. The plant plays a key role in protecting the water quality of the Noye and Somme rivers, supporting aquatic life and downstream ecosystems.

The plant discharges into the Noye River, which flows into the Avre and then the Somme River, eventually reaching the English Channel. The Somme River basin supports diverse aquatic habitats and is an important ecological corridor for fish and bird species. The region's chalk streams are sensitive to nutrient pollution, making secondary treatment essential for maintaining water quality.