IDL_SANTA_CHIARA Wastewater Treatment Plant, Pitigliano, Toscana

IDL_SANTA_CHIARA is a wastewater treatment plant located in Pitigliano, a town in the Toscana region of Italy. The plant serves a small population of 262 people, reflecting its role in managing municipal wastewater for a rural community. It is situated inland, more than 10 km from the coast, within the broader Tuscan landscape. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 400 m³/day and a current discharge volume of 51.87 m³/day, the plant operates well below its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), small agglomerations like this are required to have appropriate treatment, and secondary treatment meets the directive's standards for inland freshwater discharges. The treated effluent is discharged into local water bodies that eventually drain into the Tyrrhenian Sea via the Fiora River basin. The plant's operation helps protect the region's water quality, supporting aquatic life and downstream ecosystems. The surrounding area is characterized by hilly terrain and agricultural land, making effective wastewater treatment essential for preserving local streams and groundwater.

The plant discharges treated wastewater into the Fiora River basin, which flows through southern Tuscany and empties into the Tyrrhenian Sea near the Maremma coast. This watershed supports diverse aquatic habitats and is important for regional biodiversity, including fish species and migratory birds. The inland location reduces direct marine impact, but the plant's effluent contributes to the overall health of the river system and downstream coastal waters.