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.