AULT WOIGNARUE SE Wastewater Treatment Plant, Woignarue, Hauts-de-France

AULT WOIGNARUE SE is a wastewater treatment plant located in Woignarue, within the Hauts-de-France region of northern France. The facility serves a population of approximately 3,420 and is situated near the coastal town of Onival, close to the English Channel. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 9,000 m³/day and a current discharge volume of 610.12 m³/day, the plant operates well within its capacity, ensuring effective treatment of wastewater. The treated effluent is discharged into the local coastal environment, ultimately reaching the English Channel. The plant plays a key role in protecting the marine ecosystem and supporting the region's tourism and fishing industries by maintaining high water quality standards.

The plant discharges treated wastewater into the coastal waters of the English Channel, a vital marine ecosystem that supports diverse aquatic life and important migratory corridors. The local watershed includes small coastal streams that drain directly into the Channel, and the plant's advanced treatment helps minimize nutrient and pollutant loads, safeguarding water quality for bathing and marine habitats.