2,117 plants indexed. Showing 2,025 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.
LERIN wastewater treatment plant serves the town of Lerín in Navarra, Spain, providing secondary treatment for a population of approximately 4,578. The plant discharges 343 cubic meters of treated wastewater daily.
FITERO wastewater treatment plant serves the town of Fitero in Navarra, Spain. It provides secondary treatment for a population of 3,587 and has a designed capacity of 3,633 m³/day.
CORTES wastewater treatment plant in Cortes, Navarra, Spain, serves approximately 6,001 people with secondary treatment and a designed capacity of 7,500 m³/day, discharging 536 m³/day.
CASTEJON wastewater treatment plant serves Valtierra, Navarra, Spain, treating wastewater for 6,500 people with secondary treatment.
CADREITA wastewater treatment plant serves Cadreita, Navarra, Spain, with secondary treatment for a population of 15,733. The plant has a designed capacity of 21,583 m³/day and discharges 835 m³/day.
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.
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.
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.
LA ARBOLEDA is an advanced wastewater treatment plant in Valle de Trápaga-Trapagaran, Euskadi, Spain, serving 2,000 people. It discharges 362.49 m³/day of treated effluent and is located within 10 km of the coast.
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.
EA is an advanced wastewater treatment plant in Ea, Euskadi, Spain, serving 2,228 people. It discharges 403.82 m³/day of treated wastewater near the coast of the Bay of Biscay.
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.
Liendo wastewater treatment plant in Cantabria, Spain, serves 1,590 people with advanced treatment. It discharges 637.82 m³/day and is located within 10 km of the coast.
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.
GALIZANO is a secondary wastewater treatment plant in Ribamontán al Mar, Cantabria, Spain, serving 746 people. It discharges 405.56 m³/day and has a designed capacity of 2700 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.
Figueras Ria del EO is a secondary wastewater treatment plant in Castropol, Asturias, Spain, serving 6,000 people. It discharges treated effluent near the coast, with a designed capacity of 11,600 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, CADREITA has the highest designed capacity at 21,583 m3/day.