IDL_SAN_FRANCESCO_BIS Wastewater Treatment Plant, Pitigliano, Toscana

IDL_SAN_FRANCESCO_BIS is a wastewater treatment plant located in Pitigliano, in the Toscana region of Italy. The plant serves a small population of 367 residents, reflecting its role in a rural or small-town setting within the Unione di Comuni Montani Colline del Fiora. 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. With a designed capacity of 400 m³/day and a current discharge volume of 72.65 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variability. The treated effluent is discharged into the local watershed, which ultimately drains into the Tyrrhenian Sea via the Fiora River basin. The plant's location within 50 km of the coast means its discharge contributes to the health of coastal ecosystems, including the Maremma coastal area, which supports diverse aquatic life and is an important migratory corridor for birds.

The plant discharges into the Fiora River basin, which flows through southern Tuscany and empties into the Tyrrhenian Sea near the Maremma region. The downstream environment includes coastal wetlands and marine habitats that support diverse aquatic life, including fish and bird species. The area is ecologically sensitive due to its proximity to the coast and the presence of natural reserves, though no specific protected-area designations are confirmed.