VALLE CHIESA Wastewater Treatment Plant, Villa Santo Stefano, Lazio, Italy

VALLE CHIESA is an advanced wastewater treatment plant located in Contrada Collestrambo, Villa Santo Stefano, in the province of Frosinone, Lazio, Italy. The plant serves a small population of 750 people and has a designed capacity of 800 m³/day, with a current discharge volume of 148.47 m³/day. As an advanced treatment facility, VALLE CHIESA 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 small agglomerations like this, the directive requires appropriate treatment, and advanced treatment is often implemented in sensitive areas to protect water quality. The plant's treated effluent is discharged into local watercourses that drain into the Tyrrhenian Sea via the Liri-Garigliano river system. This region supports diverse aquatic life and is important for downstream ecosystems, including coastal habitats along the Tyrrhenian coast.

VALLE CHIESA discharges into the Liri-Garigliano river basin, which flows through central Italy and empties into the Tyrrhenian Sea. The downstream environment includes ecologically sensitive coastal zones that support diverse marine life and migratory bird species. Advanced treatment helps minimize nutrient loading and protects these habitats from eutrophication.