DEP_COM_MONTE_LARCO Wastewater Treatment Plant, Rignano Flaminio, Lazio, Italy

DEP_COM_MONTE_LARCO is an advanced wastewater treatment plant located in Montelarco, within the municipality of Rignano Flaminio, in the Lazio region of Italy. The plant serves a population of 2,500 and has a designed capacity of 2,500 m³/day, with an average discharge volume of 494.91 m³/day. It 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 plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. As a facility serving a small agglomeration (under 10,000 population equivalent), it meets the directive's standards for secondary treatment, with advanced treatment providing additional nutrient removal. The plant's capacity utilization is low, indicating ample reserve capacity for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Tiber River basin and then into the Tyrrhenian Sea. The Tiber River is a major watercourse in central Italy, supporting diverse aquatic life and providing water for agriculture and urban use. The advanced treatment helps protect the river's ecological health and downstream coastal waters.

The plant discharges into the Tiber River basin, which flows through Lazio and into the Tyrrhenian Sea near Rome. The Tiber River supports a variety of fish species and is an important migratory corridor for birds. Advanced treatment at this plant reduces nutrient loads, helping to prevent eutrophication in the river and the coastal marine environment. The watershed is also used for irrigation and recreation, making water quality protection essential.