IDL_PONTE_ALLA_SERPENNA Wastewater Treatment Plant, San Rocco a Pilli, Toscana

IDL_PONTE_ALLA_SERPENNA is a wastewater treatment plant located in San Rocco a Pilli, a frazione of Sovicille in the province of Siena, Toscana, Italy. The plant serves a population of about 3,318 people and is designed to handle up to 10,000 m³ of wastewater per day, with a current discharge volume of 656.85 m³/day. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive mandates secondary treatment for all discharges from agglomerations with a population equivalent (PE) greater than 2,000, and Italy has transposed this into national law. The plant's capacity utilization is low, indicating it is operating well below its design capacity. The treated effluent is discharged into the local water system, which ultimately drains into the Tyrrhenian Sea via the Ombrone River basin. The region of Toscana is known for its sensitive aquatic environments, and the plant plays a role in protecting the water quality of the downstream river and coastal areas from nutrient pollution.

The plant discharges into the local drainage network that flows into the Ombrone River, which then empties into the Tyrrhenian Sea. The Ombrone basin supports diverse aquatic life and is an important ecological corridor in Toscana. The region's Mediterranean climate and agricultural activities make nutrient management critical to prevent eutrophication in downstream coastal waters.