Perales Tielmes Wastewater Treatment Plant, Perales de Tajuña, Spain

The Perales Tielmes wastewater treatment plant is located in Perales de Tajuña, a municipality in the Comunidad de Madrid, Spain. The facility serves a population of around 4,286 residents, classifying it as a small agglomeration under Spanish and EU regulations. As a plant in Spain, 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 appropriate treatment before discharge into freshwater bodies to protect the environment. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Tajuña River, a tributary of the Tagus River. The Tagus River flows through central Spain and into Portugal, reaching the Atlantic Ocean near Lisbon. The plant plays a role in protecting the water quality of the Tajuña River and downstream ecosystems.

The Perales Tielmes plant discharges into the Tajuña River, which flows into the Tagus River, one of the longest rivers in the Iberian Peninsula. The Tagus River supports diverse aquatic life and provides water for agriculture and urban areas. The plant's treatment helps maintain water quality in this ecologically sensitive river system, which is important for migratory fish and other species.