2,117 plants indexed.
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.
MEQUINENZA wastewater treatment plant serves Mequinenza, Spain, with secondary treatment for a population of 1,924. It discharges 348.72 cubic meters of treated wastewater daily.
LUNA wastewater treatment plant serves the municipality of Luna in Aragón, Spain. It provides secondary treatment for a population of 2,728 and has a designed capacity of 2,500 m³/day.
LUMPIAQUE wastewater treatment plant serves Rueda de Jalón in Aragón, Spain, with secondary treatment for a population of 2,410. It discharges 436.81 m³/day of treated effluent into the local watershed.
LONGARES is a secondary wastewater treatment plant in Longares, Aragón, Spain, serving approximately 5,199 people with a designed capacity of 4,000 m³/day and an average discharge volume of 942.30 m³/day.
Leciñena wastewater treatment plant serves the municipality of Leciñena in Aragón, Spain, with secondary treatment for a population of approximately 4,941. It discharges 895.54 cubic meters of treated wastewater daily.
IBDES Y JARABA wastewater treatment plant serves the municipality of Ibdes in Aragón, Spain. It provides secondary treatment for a population of 3,585 and has a designed capacity of 4,000 m³/day.
Gallur wastewater treatment plant serves the town of Gallur in Aragón, Spain, with secondary treatment. It has a designed capacity of 6,200 m³/day and serves a population of approximately 3,387.
ESCATRON wastewater treatment plant serves Escatrón, Aragón, Spain. It provides secondary treatment for a population of 1,241 and has a designed capacity of 2,000 m³/day.
DAROCA wastewater treatment plant serves the town of Daroca in Aragón, Spain, providing secondary treatment for a population of approximately 4,549. The facility has a designed capacity of 7,100 m³/day and discharges treated effluent into local water
TRICIO wastewater treatment plant in Nájera, La Rioja, Spain, serves a population of 870 with secondary treatment. It has a designed capacity of 2000 m³/day and discharges 250.21 m³/day.
SANTURDE is a secondary wastewater treatment plant in Santurdejo, La Rioja, Spain, serving a population of 1,160. It has a designed capacity of 2,000 m³/day and discharges 423.51 m³/day.
San Vicente de la Sonsierra wastewater treatment plant serves the town in La Rioja, Spain, with secondary treatment. It discharges treated water into the local environment, supporting the Ebro River basin.
BERCEO wastewater treatment plant in Estollo, La Rioja, Spain, serves a population of 902 with secondary treatment. It has a designed capacity of 2000 m³/day and discharges 403.29 m³/day.
SAN ASENSIO wastewater treatment plant serves the town of San Asensio in La Rioja, Spain. It provides secondary treatment and discharges treated water into the Ebro River basin.
RIBAFRECHA wastewater treatment plant serves Ribafrecha in La Rioja, Spain. It provides secondary treatment for a population of 1,117 and discharges 834.96 m³/day.
CERVERA DEL RIO ALHAMA is a secondary wastewater treatment plant in Cervera del Río Alhama, La Rioja, Spain, serving 2,044 people with a designed capacity of 5,000 m³/day.
BRIONES wastewater treatment plant in Briones, La Rioja, Spain, serves 1,667 people with secondary treatment. It discharges 690.01 m³/day and has a designed capacity of 6,125 m³/day.
BADARAN is a secondary wastewater treatment plant serving Badarán, La Rioja, Spain. It treats wastewater for a population of 1,261 with a designed capacity of 5,000 m³/day.
ARNEDILLO is a secondary wastewater treatment plant in Arnedillo, La Rioja, Spain, serving a population of 2,183. It discharges 229.05 m³/day of treated wastewater into the local watershed.
ALCANADRE wastewater treatment plant serves the town of Alcanadre in La Rioja, Spain. It provides secondary treatment for a population of 2,200, discharging treated water into the local watershed.
UtilityRadar indexes 2117 wastewater treatment plants in Spain, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, SAN ASENSIO has the highest designed capacity at 9,000 m3/day.