Depuratore Ponte Sodo - Advanced Wastewater Treatment Plant in Riano, Lazio

Depuratore Ponte Sodo is an advanced wastewater treatment plant located in Riano, a town in the Lazio region of central Italy. The facility serves a population of 800 people and has a designed capacity of 3,000 cubic meters per day, with an average discharge volume of 158.37 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 advanced treatment for discharges into sensitive areas. The plant's capacity utilization is low, indicating it is designed to accommodate future growth or seasonal peaks. The treated effluent is discharged into the local watershed, which ultimately drains into the Tiber River basin. The Tiber flows through Rome and into the Tyrrhenian Sea. The plant plays a key role in protecting the Tiber River and downstream coastal waters from pollution, supporting aquatic life and recreational uses.

The plant discharges into the Tiber River basin, which flows through Lazio and Rome before reaching the Tyrrhenian Sea. The Tiber supports diverse aquatic ecosystems and is an important migratory corridor for fish. Downstream, the Tiber delta and coastal areas are ecologically sensitive, hosting wetlands and marine habitats that benefit from reduced nutrient loads from advanced treatment.