DEP_COM_SONNINO Wastewater Treatment Plant, Monte Porzio Catone, Lazio, Italy

DEP_COM_SONNINO is an advanced wastewater treatment plant located in Monte Porzio Catone, a town in the Lazio region of Italy, near Rome. The plant serves a population of approximately 5,000 residents and has a design capacity of 7,000 m³/day, with a current discharge volume of about 990 m³/day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, ensuring high-quality effluent. The plant operates under Italy's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for sensitive areas and agglomerations of this scale. The treated wastewater is discharged into local watercourses that eventually drain into the Tyrrhenian Sea. This contributes to protecting the regional water quality and the downstream marine environment, supporting both ecological health and recreational uses.

The plant discharges into local streams that flow into the Tiber River basin, ultimately reaching the Tyrrhenian Sea. This coastal region supports diverse marine life and is important for tourism and fisheries. Advanced treatment helps minimize nutrient loading, protecting the sensitive coastal ecosystem from eutrophication.