HOYO DE MANZANARES Wastewater Treatment Plant, Hoyo de Manzanares, Spain

HOYO DE MANZANARES is a wastewater treatment plant located in the municipality of Hoyo de Manzanares, within the Comunidad de Madrid, Spain. The plant serves a population of around 1,561 residents, classifying it as a small-scale facility under Spanish and European regulatory frameworks. As a plant serving fewer than 2,000 population equivalents, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC) requirements for small agglomerations. Such facilities are typically expected to provide appropriate treatment to meet local environmental standards, though specific treatment processes and capacity details are not publicly available. The plant discharges treated effluent into the local watershed, which ultimately drains into the Manzanares River and then into the Jarama River, a tributary of the Tagus River. The Tagus River flows westward through Spain and Portugal before reaching the Atlantic Ocean near Lisbon. The downstream environment supports diverse aquatic life and is part of a broader river system that provides water for agriculture and urban use.

The treated effluent from HOYO DE MANZANARES enters the local Arroyo de Trofa, which flows into the Manzanares River. The Manzanares joins the Jarama River, a major tributary of the Tagus River. The Tagus River basin is ecologically significant, supporting a variety of fish species and providing critical habitat for migratory birds. The river system also supplies water for irrigation and drinking water downstream, making effective wastewater treatment essential for maintaining water quality and ecosystem health.