OCANA Wastewater Treatment Plant, Ocaña, Castilla-La Mancha, Spain

OCANA wastewater treatment plant is located in Ocaña, a municipality in the province of Toledo, Castilla-La Mancha, Spain. The plant serves a population equivalent of 15,770, classifying it as a medium agglomeration under EU regulations. It is situated inland, more than 50 km from the coast, and discharges into local watercourses. As a medium-sized agglomeration in Spain, the plant is required to meet secondary treatment standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). The directive mandates secondary treatment for all discharges from agglomerations with a population equivalent above 2,000, and more stringent treatment in sensitive areas. The plant's operational status and treatment process are consistent with standard municipal wastewater management practices in the region. The treated effluent from OCANA plant ultimately drains into the Tagus River basin, which flows westward through central Spain and Portugal before reaching the Atlantic Ocean near Lisbon. The Tagus River is a major watercourse supporting diverse aquatic life and providing water for agriculture and urban use. The plant plays a key role in protecting downstream water quality and ecological health.

The OCANA plant discharges into the Tagus River basin, which drains into the Atlantic Ocean. The Tagus River is one of the longest rivers in the Iberian Peninsula, supporting a variety of fish species and serving as an important migratory corridor for birds. The plant's treatment helps maintain water quality in this ecologically significant watershed, which also supplies drinking water to millions of people downstream.