Households and businesses across Perth, Mandurah and parts of the South West and Great Southern are being asked to turn off their sprinklers ahead of the annual Winter Sprinkler Switch-off.
The switch-off is a permanent water saving initiative requiring scheme and bore users to turn off garden reticulation from June 1 to August 31.
The measure helps save more than 5 billion litres of scheme water.
“The cooler months are a great time to switch off and let the winter rain take care of our gardens, saving water for the warmer months when there is a greater need for sprinklers," Water Minister Simone McGurk said.
A recent survey by Water Corporation found around 80 per cent of customers do the right thing and switch off their sprinklers in winter.
Using sprinklers during the switch-off can result in a $100 fine if witnessed by a Water Corporation inspector, or a written warning if reported by a member of the public.
Since being introduced in 2010, the annual Winter Sprinkler Switch-Off has saved around 60 billion litres of water - enough to fill Optus Stadium 60 times.
Hand watering is permitted during the Switch-off and some exemptions may also apply.
To find out if your suburb is included, visit watercorporation.com.au/wintersprinklerswitchoff and enter your postcode.