Central Coast Council has commenced Shutdown 4 of the Mardi Water Treatment Plant upgrade, marking another significant milestone in the region’s largest water infrastructure project this decade. Running from 2 April to 17 April 2025, these critical works will enhance long-term water security and ensure the plant can continue delivering safe, high-quality drinking water to the growing community.

Mardi Water Treatment Plant supplies approximately half of the Central Coast’s drinking water. During the shutdown, water supply will be maintained through Somersby Water Treatment Plant, existing network storages, and Council’s shared water connection to Hunter Water.

While major disruptions to water supply, are no expected residents are encouraged to be mindful of their water use during this period.

Central Coast Council is delivering the $82.5 million Mardi Water Treatment Plant upgrade in partnership with the NSW Government’s Restart NSW Safe and Secure Water Program, which is contributing $6.85 million to the project. The program funds essential water infrastructure projects across regional NSW to improve water quality, security, and environmental outcomes.

For more information on the upgrade, search ‘Mardi Water Treatment Plant upgrade’ at centralcoast.nsw.gov.au.

For tips on how to save water at home, go to lovewater.centralcoast.nsw.gov.au.