San Demetrio Corone Mezzana Wastewater Treatment Plant, Calabria, Italy

San Demetrio Corone Mezzana is a wastewater treatment plant located in San Demetrio Corone, a town in the province of Cosenza, Calabria, Italy. The plant serves a population of 985 and has a designed capacity of 1,000 cubic meters per day, with an actual discharge volume of 195 cubic meters per day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), advanced treatment is typically required for discharges into sensitive areas. Although the plant is small (under 2,000 population equivalent), its advanced treatment level suggests it may be located in a sensitive catchment. The plant's treated effluent is discharged into local watercourses that ultimately drain into the Ionian Sea. Calabria's rivers are relatively short and steep, and the region supports diverse aquatic ecosystems. The advanced treatment helps protect downstream water quality and marine habitats.

The plant discharges into local streams that flow to the Ionian Sea, part of the Mediterranean basin. Calabria's coastal waters support seagrass meadows and marine biodiversity. Advanced treatment reduces nutrient loading, which is critical for preventing eutrophication in the sensitive coastal environment.