Aqwest is the trading name of the state-owned enterprise Bunbury Water Corporation, formed in 1905 to obtain, treat and distribute water supplies. The move away from the historic Bunbury Water Board and the evolution of Aqwest occurred as part of the restructuring process in 1996/1997.
In November 2013 Aqwest became the Bunbury Water Corporation, a government trading enterprise operating under the Water Corporations Act 1995.