CHAPELLE DES MARAIS Wastewater Treatment Plant, La Chapelle-des-Marais, France

The CHAPELLE DES MARAIS wastewater treatment plant is located in La Chapelle-des-Marais, a commune in the Loire-Atlantique department of Pays de la Loire, France. The facility serves a population of around 5,817 residents, placing it in the small to medium agglomeration category under French regulations. As a French wastewater treatment plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean via the Loire River estuary. The plant plays a key role in protecting the region's water quality, particularly given the proximity to the Loire estuary, a ecologically significant area that supports diverse aquatic life and migratory fish species.

The plant discharges into the local watershed, which flows into the Loire River and its estuary before reaching the Atlantic Ocean. The Loire estuary is a dynamic environment that supports diverse aquatic life, including migratory fish such as salmon and eels. The plant's treatment helps reduce nutrient and pollutant loads, protecting downstream ecosystems and coastal waters.