Vert Pre Wastewater Treatment Plant, Le Robert, Martinique

Vert Pre is a municipal wastewater treatment plant located in Le Robert, a commune in the Martinique island region of France. The facility serves a population of approximately 2,242 residents, classifying it as a small agglomeration under French and EU regulations. Its coastal location places it within 10 km of the Caribbean Sea, making discharge management critical for marine water quality. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into coastal waters. With a designed capacity of 3,000 m³/day and an actual discharge volume of 399.97 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variability. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. Treated effluent from Vert Pre flows into local watercourses that drain into the Caribbean Sea. Martinique's coastal ecosystems include coral reefs and seagrass beds, which are sensitive to nutrient loading and pollution. The plant's secondary treatment helps mitigate eutrophication risks, supporting the ecological health of the surrounding marine environment and the island's tourism-dependent economy.

Vert Pre discharges into the Caribbean Sea via small coastal streams in the Le Robert area. The Caribbean Sea supports diverse marine life, including coral reefs and mangroves, which are sensitive to nutrient pollution. The plant's secondary treatment reduces organic load and suspended solids, helping to protect these ecosystems from eutrophication and habitat degradation.