Obras Sanitarias Mar del Plata-Batán (OSSE) is a municipal water utility operating in Mar del Plata, Argentina. It is engaged in providing potable water and sanitation services in General Pueyrredón. Water is delivered from three subsystems: the north aqueduct, which includes 96 wells; the south aqueduct, with 26 wells; and wells connected to a distribution network. Service coverage reaches 95% of the population. OSSE is also responsible for the upkeep of stormwater drains in its coverage area.