Water Story

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 System Brochure (1.60 MB)

Do you know the Central Coast Water Story?

Put together:

  • three dams
  • a series of pipelines from rivers, creeks and dams
  • a pipeline from the Hunter
  • groundwater bore fields
  • three water treatment plants
  • using water wisely in your home
  • future water supply options such as recycling or desalination 

 This is our Central Coast Water Story. To find out more see our Water Supply Map (2.52 MB) or watch our video.

Distribution system

Each individual Council manages the aspects of the distribution system within their local government area. This includes meter reading, finance and accounting, network design, system operation and maintenance.

Sometimes water is transferred between the two councils through the Bateau Bay/Foresters Beach/Wamberal link and inland where the link is from Kariong through to Ourimbah to Tuggerah 2 Reservoir.

Trunk mains and pumping stations deliver water through the distribution system to the 50 storage reservoirs. The reservoirs serve to maintain stable water pressure, supplement water availability during high demand periods and provide a safety net - should a failure occur within the distribution system.

Residents are supplied from the network of smaller diameter pipes connected to reservoir outlet mains and trunk mains.