CANTALEJO Wastewater Treatment Plant, Cantalejo, Segovia, Castilla y León, Spain

The CANTALEJO wastewater treatment plant is located in the municipality of Cantalejo, within the province of Segovia in the autonomous community of Castilla y León, Spain. The facility serves a population equivalent of around 11,800, classifying it as a medium-sized agglomeration under European Union regulations. As a Spanish wastewater treatment plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. Compliance with the directive ensures appropriate treatment standards. The treated effluent from the plant is discharged into local watercourses that eventually drain into the Duero River basin, one of the major river systems in the Iberian Peninsula. The Duero flows westward through Spain and Portugal before reaching the Atlantic Ocean. The plant plays a key role in protecting the local aquatic environment and downstream water quality.

The CANTALEJO plant discharges into the Duero River basin, which drains into the Atlantic Ocean via the Douro River in Portugal. The basin supports diverse aquatic life and is an important ecological corridor in the region. The plant's operation helps maintain water quality in this sensitive watershed, which is subject to EU water framework directives.