DEPURATORE_CO_BA_L_B_A_VALENTANO Wastewater Treatment Plant, Valentano, Lazio, Italy

DEPURATORE_CO_BA_L_B_A_VALENTANO is a municipal wastewater treatment facility located in Valentano, a town in the province of Viterbo, Lazio, Italy. The plant serves a population of approximately 3,000 residents and has a designed capacity of 3,200 cubic meters per day, with a current discharge volume of about 594 m³/day, indicating it operates well below its capacity. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. As an Italian facility, it operates under national regulations that transpose the EU directive, ensuring compliance with stringent effluent standards. The treated wastewater is discharged into the local watershed, which ultimately drains into the Tyrrhenian Sea via the Marta River and Lake Bolsena. The plant's advanced treatment helps safeguard the ecological health of Lake Bolsena, a volcanic lake of significant environmental and recreational value, and the downstream coastal waters.

The plant discharges into the catchment of Lake Bolsena, a large volcanic lake in Lazio that drains via the Marta River into the Tyrrhenian Sea. Lake Bolsena supports diverse aquatic life and is an important resource for local communities. Advanced treatment at this plant helps control nutrient inputs, reducing the risk of eutrophication in the lake and protecting downstream coastal ecosystems.