Perth is characterised by predominantly sandy soils, which enable a lot of the stormwater to infiltrate into the ground. The shallow groundwater is then abstracted by various users for purposes such as garden and public open space irrigation, which is an indirect way to use stormwater.
Because most of the rain in Perth falls in winter, the stormwater in the drains would need to be collected and stored somewhere for uses such as irrigation in summer. It would also need to be treated and delivered to users. These factors often make large scale stormwater recycling not viable, however it may be considered in the longer term.
On a smaller scale, some local shires take stormwater directly from the drains and use it locally for irrigation purposes. Stormwater can also be recycled on site by implementing elements of Water Sensitive Urban Design, which is gaining momentum in Western Australia.