Overview
ALEGRIA DULANTZI is a secondary wastewater treatment plant serving Alegría-Dulantzi in Euskadi, Spain. It treats wastewater for approximately 2,500 residents with a designed capacity of 2,500 m³/day.
ALEGRIA DULANTZI is a municipal wastewater treatment plant located in Alegría-Dulantzi, a town in the province of Araba/Álava within the Basque Country (Euskadi), Spain. The plant serves a population of approximately 2,500 people, reflecting the scale of a small agglomeration in this region of northern Spain. The plant provides secondary treatment, which is the standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into freshwater bodies. With a designed capacity of 2,500 m³/day and a daily discharge volume of around 503 m³, the facility operates well within its capacity. The plant's treatment process meets the regulatory standards for organic matter and suspended solids removal typical of secondary treatment. The treated effluent is discharged into a local watercourse that eventually drains into the Ebro River basin, which flows into the Mediterranean Sea. The plant plays a key role in protecting the local aquatic environment and downstream water quality in the Ebro catchment, supporting both ecological health and human uses of water resources.
Environmental context
The plant discharges into a tributary of the Zadorra River, which flows into the Ebro River and ultimately reaches the Mediterranean Sea. The Ebro basin supports diverse aquatic life, including several fish species and migratory birds. The plant's secondary treatment helps reduce nutrient and organic pollution, protecting downstream ecosystems and water quality in this agriculturally important region.
Frequently asked questions
ALEGRIA DULANTZI is located in Alegría-Dulantzi, a town in the province of Araba/Álava, in the Basque Country (Euskadi), Spain.
The plant serves approximately 2,500 residents, classifying it as a small agglomeration under EU wastewater directives.
The plant discharges treated effluent into a local tributary of the Zadorra River, which flows into the Ebro River and eventually reaches the Mediterranean Sea.
The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive for discharges into freshwater bodies from agglomerations of this size.
As a Spanish plant, ALEGRIA DULANTZI operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for small agglomerations discharging into freshwater.
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