Montesano Salentino Wastewater Treatment Plant - Puglia, Italy

The Montesano Salentino wastewater treatment plant is located in the municipality of Montesano Salentino, in the Lecce province of Puglia, Italy. This facility serves a population of approximately 4,669 residents, making it a small-scale municipal plant typical of rural towns in southern Italy. 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 9,836 cubic meters per day and an actual discharge volume of 733 cubic meters per day, the plant operates well below its capacity, indicating it is sized for future growth or seasonal peaks. The treated effluent is discharged into local water bodies that ultimately drain into the Ionian Sea, part of the Mediterranean basin. The plant plays a key role in protecting the region's coastal waters and groundwater from pollution, supporting both environmental health and tourism in the Salento peninsula.

The plant discharges into local streams that flow toward the Ionian Sea, a semi-enclosed sea with limited water exchange. The Salento peninsula's karst geology makes groundwater particularly vulnerable to contamination. The plant's secondary treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in coastal waters, protecting marine biodiversity and supporting the region's tourism-dependent economy.