GRASSE Marigarde Wastewater Treatment Plant, Grasse, France

GRASSE Marigarde is a wastewater treatment plant located in Grasse, in the Alpes-Maritimes department of Provence-Alpes-Côte d'Azur, France. It serves a population of approximately 6,403 people, making it a small agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant is situated at Promenade Verte, Grasse, in the French Riviera hinterland. As a French facility, GRASSE Marigarde operates under the national transposition of the EU Urban Waste Water Treatment Directive, which requires secondary treatment for agglomerations of this size discharging into freshwater or estuaries. For small agglomerations like this, appropriate treatment ensures compliance with environmental standards. The plant's treated effluent ultimately drains into the Mediterranean Sea via local watercourses. The region is known for its karstic geology and sensitive coastal ecosystems, including seagrass meadows and marine habitats. Proper treatment is essential to protect these environments from nutrient pollution and other contaminants.

GRASSE Marigarde discharges into local streams that flow toward the Mediterranean Sea, specifically the Bay of Cannes. The downstream environment includes coastal lagoons and marine habitats that support diverse aquatic life, including seagrass beds and fish nurseries. The region's karstic terrain means groundwater and surface water are closely connected, making pollution control critical for both freshwater and marine ecosystems.