Obras Sanitarias de la Nación

Sanitary Works of the Nation
Native name
Obras Sanitarias de la Nación
Company typePublic
IndustrySanitation
Founded18 July 1912
FounderRoque Sáenz Peña
Defunct15 December 1992 (1992-12-15)
FateDissolved, assets privatized in 1993 under the Carlos Menem administration
Successor
    • Aguas Argentinas (1993–2006)
    • AySA (2006–present)
Headquarters,
Area served
Argentina
ProductsDrinking water, sewer service
OwnerGovernment of Argentina

Sanitary Works of the Nation (Spanish: Obras Sanitarias de la Nación, abbreviated OSN) was a state-owned company of Argentina dedicated to supplying the public with running water and sewer services. Established in 1912, the company's operation area included mostly the Buenos Aires Province area.

The company had different denominations and was privatized during the presidency of Carlos Menem with influence from the French group Suez, the Spanish company Aguas de Barcelona, and other private groups like Banco Galicia.