CERISANO_S_IANNI Wastewater Treatment Plant, Santo Ianni, Calabria, Italy

The CERISANO_S_IANNI wastewater treatment plant is located in Santo Ianni, a locality within the municipality of Cerisano in the province of Cosenza, Calabria, Italy. The plant serves a population of approximately 1,500 people and has a designed capacity of 2,500 cubic meters per day, with a current discharge volume of about 297 m³/day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, aligning with the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for sensitive areas. The advanced level indicates the plant is equipped to meet stringent effluent standards. The plant discharges treated wastewater into a local watercourse that eventually drains into the Tyrrhenian Sea. Its inland location, more than 10 km from the coast, reduces direct marine impact, but the treated effluent contributes to the overall water quality of the regional watershed, supporting downstream ecosystems.

The plant discharges into a tributary of the Crati River basin, which flows into the Gulf of Taranto in the Ionian Sea. The region's Mediterranean climate and mountainous terrain influence runoff patterns. The treated effluent supports aquatic life in the receiving stream, which is part of a watershed that provides habitat for diverse species and is important for local agriculture.