Le BREIL SUR MERIZE Wastewater Treatment Plant, Le Breil-sur-Mérize, France

Le BREIL SUR MERIZE is a wastewater treatment plant located in the ZA du Landon area of Le Breil-sur-Mérize, a commune in the Sarthe department of Pays de la Loire, France. The plant serves a population of approximately 900 residents and has a designed capacity of 2,000 cubic meters per day, with a current discharge volume of 160.56 cubic meters per day. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters, aligning with French national regulations for areas designated as sensitive. The treated effluent is discharged into the local watershed, which ultimately drains into the Sarthe River, a tributary of the Loire River. The Loire River basin is one of France's largest and most ecologically significant, supporting diverse aquatic life and providing water for agriculture and human consumption. The plant's advanced treatment helps reduce nutrient loading and protect downstream water quality.

The plant discharges into the local watercourse that flows into the Sarthe River, a major tributary of the Loire River. The Loire basin is ecologically sensitive, supporting diverse fish populations and migratory species. Advanced treatment at this plant helps minimize nutrient pollution, which is critical for preventing eutrophication in downstream rivers and the Loire estuary.