Water Supply System

The Central Coast has the third largest urban water supply system in New South Wales.

Water is drawn from four streams at Mangrove and Mooney Creeks in Gosford and Wyong River and Ourimbah Creek in Wyong.

There are three dams at Mangrove Creek, Mooney Mooney and Mardi, as well as three weirs at Wyong River, Ourimbah Creek and Mangrove Creek.

The Mardi-Mangrove Link transfers water from Wyong River for storage in Mangrove Creek Dam.

We have six groundwater bores that extract water from below the ground.

Water also is transported into the system by the Hunter Connection. This two way pipeline provides additional water during drought or for operational reasons for both the Central Coast and Hunter.

There are two water treatment plants located at Somersby and Mardi that treat water from our dams and another treatment plant at Woy Woy that treats water from groundwater bore fields in the area. These plants treat the water and deliver quality water complying with Australian Drinking Water Guidelines.

For more information check out our Central-Coast-Water-Supply-Brochure

Related information
Rainwater tanks - maintenance and testing of rainwater tanks used as a source of drinking water.