2,117 plants indexed. Showing 1,594 matching current filters.
Spain treats over 90% of its wastewater to secondary or higher standards. Major operators include ACCIONA, FCC Aqualia, and regional consortia. UtilityRadar indexes 2117 wastewater treatment plants in Spain with a combined designed capacity of 3,967,981 m³/day. The largest plant on file is LA ALJORRA, treating 70,417 m³/day.
Spain treats over 90% of its wastewater to secondary or higher standards. Major operators include ACCIONA, FCC Aqualia, and regional consortia.
UtilityRadar's directory currently lists 2,117 wastewater treatment plants across Spain. Together these plants represent a combined designed capacity of approximately 3,967,981 m³/day.
By treatment level, the directory contains 652 secondary, 307 advanced, 11 primary-treatment plants. Secondary treatment (typically activated sludge with biological nutrient removal) is the most common standard.
The largest plant indexed for Spain is LA ALJORRA, with a designed capacity of 70,417 m³/day.
Plant records are aggregated from publicly available regulatory data (US EPA ECHO, EU UWWTD reporting, national water authority publications), augmented by direct operator information and verified via Google Maps coordinates. Each record includes location, treatment level, capacity where known, operator and operational status. To browse plants by treatment level worldwide, see our secondary and advanced filter views, or read our guide to how sewage treatment works.
ARTAJONA wastewater treatment plant serves the town of Artajona in Navarre, Spain. It provides secondary treatment for a population of 1,697 and has a designed capacity of 3,400 m³/day.
AOIZ wastewater treatment plant in Aoiz/Agoitz, Navarra, Spain, serves a population of 5,417 with secondary treatment. The plant is currently closed and has a designed capacity of 7,083 m³/day.
DICASTILLO ALLO is a secondary wastewater treatment plant serving the town of Allo in Navarra, Spain. It treats wastewater from a population of 1,077 with a designed capacity of 7,283 m³/day.
ABLITAS wastewater treatment plant in Ablitas, Navarra, Spain, serves a population of 3,102 with secondary treatment. The plant is now closed, but its designed capacity was 3,500 m³/day.
MONTEAGUDO wastewater treatment plant in Monteagudo, Navarra, Spain, serves approximately 5,047 people with secondary treatment. It operates under EU Urban Waste Water Treatment Directive 91/271/EEC.
ARAIA wastewater treatment plant serves Albeiz, Asparrena in Euskadi, Spain. It provides secondary treatment for a population of 2,000 with a designed capacity of 3,700 m³/day.
LARRABETZU wastewater treatment plant serves the town of Larrabetzu in Euskadi, Spain, with advanced treatment for a population of 2,000. It discharges 663.36 m³/day of treated water.
LABASTIDA wastewater treatment plant serves Labastida / Bastida in Euskadi, Spain. It provides secondary treatment for a population of 11,334 with a designed capacity of 15,360 m³/day.
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.
Santa Maria de Cayon wastewater treatment plant in Saron, Cantabria, Spain, serves 614 people with secondary treatment. It discharges 111.29 m³/day and has a designed capacity of 3,000 m³/day.
SELAYA wastewater treatment plant serves the municipality of Selaya in Cantabria, Spain, providing secondary treatment for a population of 3,150. The plant has a designed capacity of 3,500 m³/day and discharges 867.55 m³/day of treated effluent.
ARENAS DE IGUNA wastewater treatment plant serves the small population of Arenas de Iguña in Cantabria, Spain. It provides advanced treatment and discharges a modest volume of treated water.
BECERREA wastewater treatment plant in Becerreá, Galicia, Spain, serves a population of 2,691 with advanced treatment. The plant is currently closed.
Viana do Bolo wastewater treatment plant in Galicia, Spain, serves 1,566 people with secondary treatment. The plant is currently closed, with a designed capacity of 2,500 m³/day.
POBRA DE TRIVES wastewater treatment plant serves A Pobra de Trives in Galicia, Spain, with advanced treatment for a population of 3,137. It discharges 556.23 m³/day and has a designed capacity of 2,500 m³/day.
MACEDA wastewater treatment plant in Maceda, Galicia, Spain, serves 2,860 people with advanced treatment and a designed capacity of 3,500 m³/day, discharging 622.18 m³/day.
Baños de Molgas wastewater treatment plant in Galicia, Spain, serves 822 people with advanced treatment. The plant is now closed, having discharged treated effluent into the local watershed.
MORANA wastewater treatment plant in Santa Lucía de Moraña, Galicia, Spain, serves 1,781 people with advanced treatment. The plant is now closed.
ORTIGUEIRA wastewater treatment plant in Ortigueira, Galicia, Spain, serves 3,107 people with advanced treatment. It discharges 859.33 m³/day and has a designed capacity of 6,000 m³/day.
CAMARINAS wastewater treatment plant in Camariñas, Galicia, Spain, serves a population of 3,314 with advanced treatment and a designed capacity of 5,000 m³/day, discharging 796.33 m³/day.
UtilityRadar indexes 2117 wastewater treatment plants in Spain, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, ARENAS DE IGUNA has the highest designed capacity at 20,000 m3/day.