My GWW and credit card payments will be offline from 8pm Saturday 9 May to 1pm Sunday 10 May 2026 while we complete scheduled updates. During this time, you can still pay your bill using BPAY or Post Billpay. Call 13 44 99 for billing support on Sunday between 9am-5pm, or to report a fault or emergency anytime - 24/7.
Billing updates and customer privacy
We’re here to help with billing issues and potential privacy incidents. Learn more.
As part of an enforceable undertaking, we’re improving how we manage billing to better support you. Learn more.
Important customer update
Billing updates and customer privacy
We’re here to help with billing issues and potential privacy incidents. Learn more.
As part of an enforceable undertaking, we’re improving how we manage billing to better support you. Learn more.
Water supply change notification – Bacchus Marsh, Darley, Maddingley and Parwan
6 June 2024
On Wednesday 12 June 2024, we’re switching the water source in Bacchus Marsh, Darley, Maddingley and Parwan from Merrimu Reservoir to the Melbourne supply system.
We’re making this change so we can carry out planned maintenance on the Merrimu Water Filtration Plant.
We expect this work will take 8-9 weeks, returning to local supply by early August. We use different drinking water sources to supply our service area. This means we can provide a reliable water supply when demand is high, and during repairs and maintenance.
Water can have a slightly different taste or odour depending on the catchment it’s sourced from.
The change in taste and odour is caused by different water treatment processes used across our network to meet required drinking water quality standards.
If you notice a change at the tap, it's nothing to be concerned by – your water is safe to drink and use as normal.
