NAVA DE LA ASUNCIÓN Wastewater Treatment Plant, Santiuste de San Juan Bautista, Castilla y León

NAVA DE LA ASUNCIÓN is a wastewater treatment plant located in Santiuste de San Juan Bautista, Segovia, within the autonomous community of Castilla y León, Spain. The plant serves a population of around 9,625 people, placing it in the small-to-medium agglomeration category under EU classification. As a Spanish facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The plant's treatment processes and capacity are managed to comply with national and EU standards for effluent quality and environmental protection. The treated wastewater is discharged into local watercourses that eventually drain into the Duero River basin, a major hydrological system in northwestern Spain. The Duero River flows westward into Portugal and empties into the Atlantic Ocean at Porto. The plant plays a key role in protecting the local watershed and downstream aquatic ecosystems.

The plant discharges into the Duero River basin, which drains into the Atlantic Ocean via the Douro River in Portugal. The local watershed supports diverse aquatic life and agricultural activities. The plant's operations help maintain water quality in this ecologically sensitive region, which is important for both biodiversity and human use.