Montalbo Wastewater Treatment Plant | Montalbo, Castilla-La Mancha, Spain

The Montalbo wastewater treatment plant is located in the town of Montalbo, within the province of Cuenca in the Castilla-La Mancha region of central Spain. The facility serves a population of around 5,000 residents and operates as a key component of the local municipal wastewater infrastructure. The plant provides secondary treatment, which is the standard biological treatment process required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological oxidation and sedimentation to remove organic matter and suspended solids before discharge. The treated effluent is discharged into the local hydrological network, which ultimately drains into the Tagus River basin, one of the most important river systems in Spain. The Tagus River flows westward through central Spain and into Portugal, eventually reaching the Atlantic Ocean near Lisbon. The plant's operation helps protect downstream water quality and aquatic ecosystems.

The Montalbo treatment plant discharges into the Tagus River basin, which is the longest river in the Iberian Peninsula. The Tagus River supports diverse aquatic life and provides water for agriculture and urban use. Downstream, the river flows through the Alcantara reservoir and into the Tejo estuary in Portugal, a critical habitat for migratory birds and fish species. The plant's secondary treatment helps reduce organic pollution and nutrient loads, contributing to the ecological health of this transboundary river system.