Estremera Wastewater Treatment Plant, Estremera, Comunidad de Madrid

Estremera wastewater treatment plant is located in the municipality of Estremera, within the Comunidad de Madrid, Spain. The plant serves a population of approximately 973 residents, classifying it as a small agglomeration under Spanish and EU regulations. The plant provides secondary treatment, which is the standard level required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,000 cubic meters per day and an average discharge volume of 365.61 cubic meters per day, the plant operates well below its capacity, indicating room for future growth. The treated effluent is discharged into the local water system, which ultimately drains into the Tagus River basin. The Tagus River is one of the longest rivers in the Iberian Peninsula, flowing through Spain and Portugal before reaching the Atlantic Ocean. The plant plays a key role in protecting the local environment and downstream water quality.

The plant discharges into the Tagus River basin, which flows westward through central Spain and into Portugal, eventually reaching the Atlantic Ocean near Lisbon. The Tagus River supports diverse aquatic life and is an important ecological corridor. The plant's secondary treatment helps reduce organic pollutants and suspended solids, protecting the river's water quality and downstream ecosystems.