Tours La Riche La Grange David Wastewater Treatment Plant, La Riche, France

Tours La Riche La Grange David is a major wastewater treatment facility located in La Riche, a commune in the Indre-et-Loire department of the Centre-Val de Loire region, France. The plant serves a population equivalent of 275,750, classifying it as a large agglomeration under EU regulations. It is situated near the Loire River, a UNESCO World Heritage site, and plays a key role in protecting the river's water quality. As a large agglomeration, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum and tertiary treatment in sensitive areas. The Loire basin is designated as a sensitive area due to eutrophication risks, so the plant likely employs advanced treatment to reduce nutrients. Its scale suggests robust infrastructure. The plant's treated effluent discharges into the Loire River, which flows westward through the Loire Valley to the Atlantic Ocean. The Loire is one of France's longest rivers and supports diverse aquatic life, including migratory fish like Atlantic salmon. The plant's operations are critical for maintaining the ecological health of this iconic river system and the downstream estuarine environment.

The plant discharges into the Loire River, which flows through the Loire Valley to the Bay of Biscay in the Atlantic Ocean. The Loire is a major European river with a rich biodiversity, supporting species such as the European eel and the Atlantic salmon. The river's watershed includes agricultural and urban areas, making nutrient management crucial to prevent eutrophication. The plant's location upstream of the Loire estuary means its effluent quality directly impacts the sensitive coastal and marine ecosystems.