Bustarviejo Wastewater Treatment Plant, Bustarviejo, Comunidad de Madrid, Spain

The Bustarviejo wastewater treatment plant is located in the municipality of Bustarviejo, within the Comunidad de Madrid, Spain. It serves a small population of around 2,279 residents, typical of a rural agglomeration in the region. As a small-scale plant in Spain, it operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations under 2,000 population equivalent, the directive requires appropriate treatment, which for this size typically involves secondary treatment or equivalent to protect local water quality. The plant discharges treated effluent into the local watercourse, which is part of the Lozoya River basin. The Lozoya River flows into the Jarama River, a tributary of the Tagus River, which ultimately reaches the Atlantic Ocean near Lisbon. The plant plays a key role in protecting the Lozoya River and downstream ecosystems from nutrient pollution.

The plant discharges into the Lozoya River, a tributary of the Jarama River, which flows into the Tagus River basin. The Tagus River is one of the longest rivers in the Iberian Peninsula, draining into the Atlantic Ocean. The Lozoya River supports diverse aquatic life and is important for regional water supply. The plant's treatment helps maintain water quality in this ecologically sensitive watershed.