Le Pallet 2 Pont Grenouiller Wastewater Treatment Plant, Le Pallet, France

Le Pallet 2 Pont Grenouiller is an advanced wastewater treatment plant located in the industrial zone of Le Pallet, a commune in the Loire-Atlantique department of Pays de la Loire, France. The plant serves a population of 2,233 and has a designed capacity of 3,500 cubic meters per day, with an average daily discharge volume of approximately 398 cubic meters. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, aligning with the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for sensitive areas. The plant's capacity utilization is low relative to its design, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local water system, which ultimately drains into the Loire River and then the Atlantic Ocean. The plant plays a key role in protecting the Loire estuary and downstream marine environment from nutrient pollution and other contaminants.

The plant discharges into the Loire River basin, which flows through western France and empties into the Bay of Biscay in the Atlantic Ocean. The Loire estuary is an ecologically sensitive area supporting diverse aquatic life, including migratory fish species. Advanced treatment helps reduce nutrient loading, protecting downstream water quality and marine ecosystems.