NAVAHERMOSA Wastewater Treatment Plant, Navahermosa, Toledo, Spain

NAVAHERMOSA is a wastewater treatment plant located in Vaquerizuela, Navahermosa, Toledo, within the autonomous community of Castilla-La Mancha, Spain. The facility serves a population of around 9,711 residents, classifying it as a small to medium agglomeration under Spanish and EU regulations. As a plant of this scale in Spain, NAVA HERMOSA operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for discharges into freshwater and estuaries from agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas, such as those prone to eutrophication. The plant discharges treated effluent into the local watershed, which ultimately drains into the Tagus River basin. The Tagus River is the longest river in the Iberian Peninsula, flowing westward through Spain and Portugal to the Atlantic Ocean near Lisbon. The river supports diverse aquatic life and provides water for agriculture, industry, and drinking water for millions of people.

The treated effluent from NAVA HERMOSA enters the local tributaries of the Tagus River basin. The Tagus River flows through central Spain and Portugal, eventually reaching the Atlantic Ocean. The river's ecological health is important for migratory fish species, such as the European eel, and for maintaining water quality in the downstream estuary and coastal areas. The region's semi-arid climate makes water resource management critical for both human use and ecosystem preservation.