IDL_NIBBIANO Wastewater Treatment Plant, Montepulciano, Tuscany

IDL_NIBBIANO is an advanced wastewater treatment plant located in Montepulciano, within the Unione dei Comuni Valdichiana Senese in Tuscany, Italy. The plant serves a population of 4,570 and has a designed capacity of 5,500 cubic meters per day, with an average daily discharge of 904.70 cubic meters. As an advanced treatment facility, IDL_NIBBIANO goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (under 10,000 population equivalent), the directive requires appropriate treatment, and Italy's implementation often mandates advanced treatment in sensitive areas like the Valdichiana basin. The plant's treated effluent is discharged into the local water system, which flows into the Chiana River, a tributary of the Tiber River. The Tiber ultimately drains into the Tyrrhenian Sea. The Valdichiana region is an ecologically sensitive area with agricultural and natural landscapes, and the plant's advanced treatment helps protect downstream water quality and aquatic life.

IDL_NIBBIANO discharges into the Chiana River basin, which feeds into the Tiber River and eventually the Tyrrhenian Sea. The Valdichiana area is a fertile valley with significant agricultural activity, and the plant's advanced treatment helps reduce nutrient loading that could otherwise contribute to eutrophication in downstream water bodies. The region supports diverse aquatic habitats and is important for migratory bird species.