DEP_COM_PISCIARELLO Wastewater Treatment Plant, Poli, Lazio, Italy

DEP_COM_PISCIARELLO is an advanced wastewater treatment plant located in Poli, a municipality in the Lazio region of Italy. The plant serves a population of approximately 2,300 people and has a designed capacity of 3,500 cubic meters per day, with an average discharge volume of 455.32 m³/day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size, the directive requires secondary treatment, but Italy often mandates advanced treatment in sensitive areas to protect water quality. The plant discharges treated effluent into local watercourses that eventually drain into the Tyrrhenian Sea. Its advanced treatment helps safeguard downstream ecosystems, including rivers and coastal waters, from nutrient pollution and other contaminants.

The plant discharges into local streams that flow toward the Tyrrhenian Sea, part of the Mediterranean basin. The Lazio region features karstic terrain and sensitive groundwater systems, making advanced treatment important for protecting both surface and groundwater quality. The downstream environment supports diverse aquatic life and is used for recreation and fishing.