Meslay-du-Maine 2 Wastewater Treatment Plant, Meslay-du-Maine, France

Meslay-du-Maine 2 is a wastewater treatment plant located in the commune of Meslay-du-Maine, within the Mayenne department of the Pays de la Loire region in northwestern France. The plant serves a population of approximately 6,200 residents, placing it in the small-to-medium agglomeration category under French and EU regulations. As a facility serving fewer than 10,000 people, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment before discharge. French plants of this scale typically employ secondary biological treatment to meet national water quality standards. The plant's treated effluent is discharged into local waterways that ultimately drain into the Loire River basin, one of France's major river systems. The receiving environment supports diverse aquatic life and is important for regional water quality management.

The plant discharges into the local watershed, which is part of the larger Loire River basin. The Loire River flows westward through the Pays de la Loire region before emptying into the Atlantic Ocean near Saint-Nazaire. This downstream environment supports diverse aquatic ecosystems, including fish species such as Atlantic salmon and European eel, and is an important migratory corridor.