18,348 plants indexed worldwide.
Biological process removes dissolved organic matter after primary treatment.
Arnolds Cove Wharf is a secondary treatment plant serving 668 residents in Arnold's Cove, Newfoundland and Labrador, Canada.
Arnschwang wastewater treatment plant in Nößwartling, Bavaria, Germany serves about 2,164 people with secondary treatment. The plant has a designed capacity of 3,500 m³/day and discharges 436.75 m³/day.
Arnulfo R Gomez wastewater treatment plant serves 913 people in Amulfo R Gomez, Durango, Mexico. It provides secondary treatment with a designed capacity of 138.24 volume units.
Aroland Lagoon is a secondary wastewater treatment plant in Thunder Bay District, Ontario, Canada, serving a small population of 200.
Arosa Luen is a secondary treatment plant serving 187 people in Lüen, Graubünden, Switzerland. It discharges 84.88 m³/day of treated wastewater.
Arpas Szennyviztisztito Telep is a secondary treatment plant serving Rábapatona, Hungary. It treats wastewater for 633 people with a designed capacity of 1,375 m³/day.
Arpin WWTP is a secondary treatment plant serving 354 people in the Town of Arpin, Wisconsin. It discharges 113.56 megaliters annually and operates under US EPA NPDES regulations.
ARQUA POLESINE VIA GARIBALDI is a secondary wastewater treatment plant in Arquà Polesine, Veneto, Italy. It serves a population of 969 and has a designed capacity of 1,000 m³/day.
ARQUENNES wastewater treatment plant in Seneffe, Hainaut, Belgium, serves 181 people with secondary treatment. The plant is now closed.
Arraiolos Norte is a secondary treatment plant serving 400 people in Arraiolos, Évora, Portugal. It discharges 66.69 m³/day of treated wastewater, operating under EU Urban Waste Water Treatment Directive standards.
Arraiolos Poente is a secondary wastewater treatment plant serving 2,600 people in Arraiolos, Évora, Portugal. It has a designed capacity of 3,000 m³/day and discharges 433.5 m³/day.
ARRE is a secondary wastewater treatment plant in Årre, Denmark, serving 750 people. It discharges 699.75 m³/day and is located within 10 km of the coast.
Arriba Town Of wastewater treatment plant serves the small community of Arriba, Colorado, with secondary treatment. It discharges treated water into the local watershed, supporting downstream ecosystems.
ARRILD wastewater treatment plant serves Toftlund, Denmark, treating wastewater for 659 people. The facility provides secondary treatment and discharges 244.33 m³/day.
Arronches wastewater treatment plant serves the town of Arronches in Portalegre, Portugal. It provides secondary treatment for a population of 2,100, discharging 350.13 cubic meters of treated effluent daily.
Arrow Rock WWTP is a secondary treatment plant serving 216 people in Arrow Rock, Missouri. It discharges 60.57 units of treated wastewater daily, with a designed capacity of 83.28 units.
ARROYO DE SAN SERVAN wastewater treatment plant serves Arroyo de San Serván, Extremadura, Spain. It provides secondary treatment for a population of 4,200 with a designed capacity of 8,000 m³/day.
ARROYO DEL OJANCO is a secondary wastewater treatment plant serving Segura de la Sierra, Andalucía, Spain. It treats wastewater for a population of 2,748 with a designed capacity of 2,748 m³/day.
Arroyo Hondo wastewater treatment plant serves a small community in Aguascalientes, Mexico, with secondary treatment. It discharges 34.56 cubic meters daily, operating at 40% of its designed capacity of 86.40 cubic meters.
Arroyo Seco wastewater treatment plant in Querétaro, Mexico, serves about 1,013 people with secondary treatment. It discharges 95.90 cubic meters of treated wastewater daily.