PRESSO FOSSO SERMIDA Wastewater Treatment Plant, Poggio Bustone, Lazio

PRESSO FOSSO SERMIDA is an advanced wastewater treatment plant located in Villa Provaroni, Poggio Bustone, in the Rieti province of Lazio, Italy. The plant serves a population of 2,130 and has a designed capacity of 3,600 cubic meters per day, with an actual discharge volume of 421.66 cubic meters per day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. As an Italian facility, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires appropriate treatment for agglomerations of this size to protect receiving water bodies. The treated effluent is discharged into local watercourses that ultimately drain into the Tyrrhenian Sea via the Tiber River basin. The plant plays a key role in safeguarding water quality in the region, supporting both ecological health and downstream uses.

The plant discharges into local streams that feed into the Tiber River basin, which flows through central Italy before reaching the Tyrrhenian Sea near Rome. The Tiber River supports diverse aquatic life and is an important water resource for agriculture and urban areas. Advanced treatment helps reduce nutrient loading, protecting downstream ecosystems from eutrophication.