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.
ALAR DEL REY wastewater treatment plant serves the municipality of Alar del Rey in Castilla y León, Spain. It provides secondary treatment for a population of approximately 2,000.
VILLALON DE CAMPOS wastewater treatment plant serves the town of Villalón de Campos in Castilla y León, Spain. It provides secondary treatment for a population of 3,117.
Viana de Cega wastewater treatment plant in Castilla y León, Spain, serves 5,319 people with advanced treatment. It discharges 575.34 m³/day and has a designed capacity of 10,401 m³/day.
ARANJUEZ NORTE is an advanced wastewater treatment plant in Aranjuez, Comunidad de Madrid, Spain. It serves a population of 7,849 and has a designed capacity of 40,000 m³/day, with a discharge volume of 329.37 m³/day.
CARABANA wastewater treatment plant in Carabaña, Comunidad de Madrid, Spain, serves a population of 879 with secondary treatment. Designed capacity is 6,200 m³/day, with a discharge volume of 459.07 m³/day.
PUENTES VIEJAS is a secondary wastewater treatment plant in Buitrago del Lozoya, Comunidad de Madrid, Spain, serving 3,504 people with a designed capacity of 6,300 m³/day.
Los Santos de la Humosa wastewater treatment plant serves 2,190 people in Comunidad de Madrid, Spain, with secondary treatment and a designed capacity of 3,000 m³/day.
Santa María de la Alameda wastewater treatment plant serves 208 people in Comunidad de Madrid, Spain, with secondary treatment. It discharges 167.54 m³/day and has a designed capacity of 2000 m³/day.
LA ESTACION wastewater treatment plant serves Santa María de la Alameda in Comunidad de Madrid, Spain. It provides secondary treatment for a population of 486 and has a designed capacity of 2000 m³/day.
SAN MARTIN NORTE is a secondary wastewater treatment plant in San Martín de Valdeiglesias, Comunidad de Madrid, Spain, serving a small population of 136 with a designed capacity of 2000 m³/day.
SAN MARTIN NORESTE is a secondary wastewater treatment plant in San Martín de Valdeiglesias, Comunidad de Madrid, Spain. It serves a small population of 63 and has a designed capacity of 5,000 m³/day.
Rozas de Puerto Real wastewater treatment plant serves 902 people in Comunidad de Madrid, Spain. It provides secondary treatment and discharges 342.13 cubic meters of treated wastewater daily.
QUIJORNA wastewater treatment plant serves Quijorna in Comunidad de Madrid, Spain. It provides advanced treatment for a population of 3,391 and has a designed capacity of 12,548 m³/day.
Pezuela de las Torres wastewater treatment plant serves the municipality in Comunidad de Madrid, Spain, with secondary treatment and a designed capacity of 2000 m³/day.
Orusco de Tajuña wastewater treatment plant serves 1,242 people in Comunidad de Madrid, Spain, with secondary treatment. It discharges 832.97 m³/day and has a designed capacity of 3,300 m³/day.
NAVALAGAMELLA wastewater treatment plant serves Navalagamella in the Comunidad de Madrid, Spain. It provides secondary treatment for a population of 2,177 with a designed capacity of 4,000 m³/day.
NAVALAFUENTE wastewater treatment plant serves the small municipality of Navalafuente in the Comunidad de Madrid, Spain. It provides secondary treatment for a population of 614.
CONJUNTA DE GASCONES is a secondary wastewater treatment plant serving Gascones, Comunidad de Madrid, Spain. It treats wastewater for 431 people with a designed capacity of 4,500 m³/day.
RIOSEQUILLO is a secondary wastewater treatment plant serving 641 people in Garganta de los Montes, Comunidad de Madrid, Spain. It discharges 922.52 m³/day and has a designed capacity of 10,000 m³/day.
FUENTIDUENA wastewater treatment plant serves Fuentidueña de Tajo in Comunidad de Madrid, Spain. It provides secondary treatment for a small population of 917, with a designed capacity of 5,000 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, ARANJUEZ NORTE has the highest designed capacity at 40,000 m3/day.