Perugia San Martino Wastewater Treatment Plant, Perugia, Umbria, Italy

Perugia San Martino is a municipal wastewater treatment plant located in the Casaccia area of Perugia, in the Umbria region of Italy. The plant serves a population of approximately 4,114 people and has a designed capacity of 8,500 m³/day, with an average daily discharge of 814.43 m³/day. The plant provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids before discharge. The treated effluent is released into the local water system, which ultimately drains into the Tiber River basin. The Tiber River flows through central Italy and empties into the Tyrrhenian Sea near Rome. The plant's operation helps protect the water quality of the Tiber River and its downstream ecosystems.

The plant discharges into the Tiber River basin, which flows through Umbria and Lazio before reaching the Tyrrhenian Sea. The Tiber River supports diverse aquatic life and is an important water resource for agriculture and urban areas. Downstream, the river delta and coastal waters are ecologically sensitive areas that benefit from reduced nutrient loads from wastewater treatment.