In this chapter of the virtual exhibition “Drought, Mud, Filth, and Flood: Water Crises in Australian Cities, 1880s–2010s,” the authors show the extent to which the people of Perth, Western Australia, have relied on the groundwater of the Swan Coastal Plain, and the implications of this reliance in a drying climate. In the context of private and public extraction of groundwater, the government in 2014 commenced a groundwater replenishment scheme to “recharge” the local aquifers with treated wastewater.