Grampians-Wimmera-Mallee Water (GWMWater) are responsible for the supply of water to approximately 72,000 people in the Grampians Wimmera Mallee region, with an area covering 62,000 square kilometres, or close to 25% of Victoria.  They manage dams and pump stations and are responsible for wastewater treatment in 71 towns. The Victorian Department of Treasury and Finance