Riachuelo Sewage System

Buenos Aires, Argentina

Sustainable Development of the Matanza-Riachuelo basin: Lot 1, 3


The "Project for the Sustainable Developement of the Matanza-Riachuelo basin", conceived to recover the Riachuelo River and the surrounding areas from an environmental point of view is the most ambitious sanitation project in Buenos Aires. The project is divided into several Lots, out of which 3 are interdependent and connected each to the others. Lot 1, the "Riachuelo Left Margin Collector", intercepts both industrial and civil discharged waters and prevent them to enter the Riachuelo River by diverting them towards a pre- treatment system. Lot 2, "the Plant for Water Pretreatment", located on the banks of the Río de la Plata River, on the right of the confluence of the Riachuelo River in the "Dock South" area, is intended to treat wastewaters physically. Lot 3 is "The Riachuelo Sewage Pipe Plant” that collects pretreated water and discharges it into the estuary of the Río de la Plata River at a distance of about 10km from the coast. 

Total cost

About USD 1,000,000,000




Aguas y Saneamientos Argentinos S.A. – Buenos Aires

Services provided

Lot 1, 3:

  • Review and approval of the detailed design
  • Supervision and construction management
  • Quality control
  • Health and safety coordination during construction
  • Environmental protection control during construction

Date: 02.10.2023