MARCHEPRIME BOURG Wastewater Treatment Plant, Marcheprime, Nouvelle-Aquitaine

MARCHEPRIME BOURG is a wastewater treatment plant located in Marcheprime, a commune in the Gironde department of Nouvelle-Aquitaine, southwestern France. The plant serves a population of around 6,606 residents, 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. The directive also mandates appropriate treatment before discharge into sensitive areas, which is relevant given the plant's proximity to the Atlantic coast. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Arcachon Bay, a semi-enclosed marine inlet on the Atlantic coast. Arcachon Bay is an ecologically significant area known for its oyster farming and diverse marine life. The plant plays a key role in protecting this sensitive coastal environment from nutrient pollution.

The plant discharges into the local watershed that flows into the Arcachon Bay, a coastal lagoon connected to the Atlantic Ocean. This bay supports extensive oyster aquaculture and is a critical habitat for migratory birds and marine species. The region's sandy soils and proximity to the coast make groundwater and surface water particularly vulnerable to nutrient enrichment, underscoring the importance of effective wastewater treatment.