Sanitation of the Matanza Riachuelo basin – relocation of La Morita and San Ignacio neighborhoods, Esteban Echeverría


The initiative consists of the relocation of the population settled on the banks of the Ortega stream, in the La Morita and San Ignacio neighborhoods, of the town of El JAgüel, in the Esteban Echeverria Municipality. The new urbanization will respond to the judicial sentence “Beatriz Mendoza c / Estado Nacional” issued by the Supreme Court of Justice of the Nation, whose execution is processed in the Federal Court No. 2 of Morón. Said ruling provides for the provision of a healthy, balanced and suitable environment for human development to families that are located within the towpath of lagoons and streams or highly floodable areas of the Matanza Riachuelo Basin.

The Matanza Riachuelo basin covers some 2,344 km2. It runs between the city of Buenos Aires and the province of Buenos Aires, covering 14 municipalities (La Matanza, Moron, Moreno, Avellaneda, Lanús, Lomas de Zamora, Esteban Echeverria, Merlo, San Vicente, General Las Heras, Presidente Perony Ezeiza) and a population of more than 6,000,000 people lives in it. It is the most polluted basin in Argentina and on which industries and services of strategic importance for the Argentine Republic have settled. In 2009, by order of the Argentine Supreme Court, the Matanza Riachuelo Basin Authority was created, the body responsible for cleaning up the basin. Among the sanitation actions, the relocation of the population settled on the banks of rivers, streams and areas with high levels of environmental vulnerability in the basin was established.

Within this framework, the Esteban Echeverria Municipality led the relocation process of 240 families settled on the banks of the Ortega stream, belonging to the La Morita and San Ignacio neighborhoods. This action included the construction of a new urbanization (Montecarlo neighborhood) in an environmentally suitable site, with all the basic infrastructure services, contemplating the needs of each family in terms of habitat and access to urban services. The housing complex has 240 houses with 2 to 5 bedrooms

On the other hand, on the banks of the Arroyo Ortega, houses will be demolished and quality public space will be built to improve the quality of life of the surrounding population and generate enhancement of the banks of the Ortega stream.

“This work will allow many neighbors to join the formal urbanization and not live in a situation of environmental risk. It is the first relocation of the ‘Mendoza’ cause of families from the province of Buenos Aires who are on the banks of the Matanza Riachuelo Basin”, affirmed Fernando Gray. The families were relocated to the new housing complex in the Montecarlo neighborhood of Monte Grande Sur. “We continue working so that many neighbors join the formal urbanization and can live in decent houses, with all the services and without environmental risk,” said Fernando Gray. Likewise, the community chief indicated: “We have already begun with the tasks of environmental healing of the banks of the Ortega stream in the neighborhoods of La Morita and San Ignacio de El Jagüel to incorporate the area for public use.”


Municipio Esteban Echeverria, ACUMAR, Ministerio de Habitat, Gobierno de la Provincia de Buenos Aires, Juzgado Federal N 4 de la República Argentina


Direct Beneficiaries: Population settled on the banks of the Ortega stream in the La Morita and San Ignacio neighborhoods
Indirect beneficiaries: Population of the Matanza Riachuelo basin


This project allows generating inclusion for 240 families who lived in an environmentally degraded area, without basic services. In this way, the quality of life of the population in a vulnerable situation is directly improved. On the other hand, the stream banks are cleaned up, resilience to floods and other climatic contingencies is increased, public space is generated for the population residing in the La Morita and San Ignacio neighborhoods. The entire relocation process was carried out including the opinions, demands and needs of the actors involved.

Additional information

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2 July 2023
inauguration of the 240 homes and relocation of families

Staff / Technical expertise
More than 80 profesionals involve in the hole process