VALDEBLORE bolline Wastewater Treatment Plant, La Bolline, France

VALDEBLORE bolline is a municipal wastewater treatment plant located in La Bolline, a village within the commune of Valdeblore in the Alpes-Maritimes department of Provence-Alpes-Côte d'Azur, France. The plant serves a population of 1,654 and is part of the region's infrastructure for managing domestic wastewater in a mountainous Alpine setting. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 4,000 m³/day and a current discharge volume of 295.07 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The facility is situated inland, more than 10 km from the coast, but within 50 km of the Mediterranean Sea. The treated effluent is discharged into a local watercourse that ultimately flows into the Mediterranean Sea via the Var River basin. The plant's operation helps protect the sensitive Alpine streams and downstream coastal waters from nutrient pollution, supporting aquatic biodiversity and recreational uses in the region.

The plant discharges into a tributary of the Var River, which flows southeast through the Alpes-Maritimes and enters the Mediterranean Sea near Nice. The Var basin supports diverse aquatic life, including migratory fish species, and the coastal zone is ecologically sensitive due to tourism and marine habitats. Secondary treatment reduces organic load and suspended solids, mitigating eutrophication risks in the downstream river and coastal waters.