COLOSIMI_CORACI Wastewater Treatment Plant, Colosimi, Calabria, Italy

COLOSIMI_CORACI is a municipal wastewater treatment plant located in Colosimi, a town in the Calabria region of southern Italy. The plant was designed to serve a population of 2,745 people, with a capacity of 2,700 cubic meters per day, and operated at a secondary treatment level. It is situated inland, more than 10 km from the coast, in a mountainous area of the Sila massif. Although the plant is currently closed, its design and scale align with the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The plant's discharge volume of 543.41 m³/day suggests it handled a portion of its capacity before closure. The facility was part of the regional wastewater infrastructure managed by local authorities in the Cosenza province. The plant's treated effluent would have been discharged into local watercourses that drain toward the Ionian Sea. The receiving waters are part of the Savuto River basin, which flows into the Gulf of Sant'Eufemia. This area supports diverse aquatic life and is important for regional water quality, particularly given the ecological sensitivity of the Ionian coastal zone.

The plant is situated in the Savuto River basin, which drains into the Gulf of Sant'Eufemia on the Ionian Sea. The Savuto River and its tributaries support a variety of freshwater species and provide habitat for migratory fish. The downstream coastal area is ecologically sensitive, with seagrass meadows and marine biodiversity that depend on good water quality from inland sources.