This FACT indicates the amount of state water supply sourced from groundwater per 100,000 persons (megalitres) in each Australian state. These figures have been calculated by taking the total volume of water sourced from groundwater in each state and dividing it by 100,000. The numbers here show that Western Australia sources the largest supply of water from groundwater sources, at 6783.2 megalitres per 100,000 persons. The Northern Territory is not far behind at 6205.0 megalitres. Compared, to these numbers groundwater makes up a small part of the water supply for the other states and territories.