Formerly an executive agency within Northern Ireland Executive, it became a government-owned company on 1 April 2007. The company now sits as an Agency within the Department of Infrastructure (DfI). The company provides 575 million litres of clean water a day for almost 1.8 million people as well as treating 340 million litres of wastewater every day, and has approximately 1,300 staff. It is responsible for 27,000 km of watermains and 16,000 km of sewerage mains, as well as 23 water treatment works and 1,030 wastewater treatment works. It cost around £460m each year to deliver water services across Northern Ireland.