ENTRAMMES 2 Wastewater Treatment Plant, Entrammes, Pays de la Loire, France

ENTRAMMES 2 is a wastewater treatment facility located in Entrammes, a commune in the Mayenne department of the Pays de la Loire region, France. The plant serves a population of approximately 1,408 residents and operates with advanced treatment capabilities, ensuring high-quality effluent discharge. As part of France's municipal wastewater infrastructure, it plays a key role in managing local sewage and protecting public health. The plant's advanced treatment level goes beyond secondary treatment, typically involving nutrient removal or other processes to meet stringent environmental standards. With a designed capacity of 2,200 cubic meters per day and an actual discharge volume of 251.18 cubic meters per day, the facility operates well below its capacity, indicating room for future growth. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide appropriate treatment, and the advanced level here exceeds the minimum secondary treatment mandate. The treated effluent is discharged into the local water system, which ultimately drains into the Mayenne River, a tributary of the Loire River. The Loire basin is ecologically significant, supporting diverse aquatic life and providing water for agriculture and recreation. By maintaining advanced treatment, ENTRAMMES 2 helps reduce nutrient loads and pollutants, contributing to the ecological health of the downstream river network and the Loire estuary.

The plant discharges into the Mayenne River, which flows into the Loire River, one of France's longest rivers, before reaching the Atlantic Ocean. The Loire basin is a vital ecological corridor, supporting diverse fish species, migratory birds, and riparian habitats. Advanced treatment at ENTRAMMES 2 helps minimize nutrient enrichment and pollution, protecting downstream water quality and the sensitive estuarine environment.