Montreuil Bellay Presle Wastewater Treatment Plant, Montreuil-Bellay, France

Montreuil Bellay Presle is a municipal wastewater treatment plant located in Montreuil-Bellay, a commune in the Maine-et-Loire department of Pays de la Loire, France. The plant serves a population of approximately 7,200 people, placing it in the small-to-medium agglomeration category under French and EU regulations. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size discharging into freshwater. The directive also mandates appropriate treatment to meet quality standards for the receiving environment. It is expected to comply with national standards set by the French Ministry of Ecology. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Loire River basin. The Loire is one of France's major rivers, flowing into the Atlantic Ocean. The plant plays a role in protecting the water quality of the Loire and its tributaries, supporting aquatic ecosystems and downstream uses such as agriculture and recreation.

The plant discharges into the Loire River basin, which flows through the Pays de la Loire region and empties into the Atlantic Ocean near Saint-Nazaire. The Loire is a ecologically significant river, supporting diverse fish species such as Atlantic salmon and European eel, and its estuary is an important migratory corridor for birds. The plant's operations help maintain water quality in this sensitive watershed, which is subject to EU water quality standards.