It had 4,362 employees in 2004 .
OSE serves 330 localities with 2.8 million inhabitants with water services and 152 localities with 0.5 million inhabitants with sewer services .
OSE had 4,362 employees in 2004 .
OSE serves 330 localities with 2.8 million inhabitants with water services and 152 localities with 0.5 million inhabitants with sewer services .