Risk Review of Hunter Water’s Distribution System


Hunter Water is required to maintain and implement a Drinking Water Quality Management System (DWQMS) as part of their operating license. Their DWQMS is aligned to the Framework for Management of Drinking Water Quality or ‘The Framework’ outlined in the Australian Drinking Water Guidelines (ADWG, 2011). The Framework requires water suppliers to undertake a risk assessment from catchment to consumer. Suppliers are also required to develop critical control points (CCPs) to ensure that unsafe water is not released into the distribution system and that drinking water is protected from contamination during distribution.

Services Offered

  • Analysis of water quality data for trends and potential problems
  • Review of existing practices with respect to water quality and public health risk and suggestions for additional controls as required
  • Identification of hazards associated with the drinking water distribution system
  • Facilitation of the risk and control point workshop
  • DWQMS manual gap analysis and rework to streamline compliance requirements


Hunter Water required assistance from CWT to review and build upon their previous distribution system risk assessment to ensure that new risks were identified and adequately managed to ensure the supply of safe drinking water. The risk assessment was conducted from clear water storage outlet to customer taps. Risk assessments for the WTPs provided a contextual risk profile for the distribution system of each water supply scheme.

Hunter Water also wished to update their DWQMS to ensure compliance with requirements and improve integration with other business systems.


CWT (in conjunction with Risk Edge Pty Ltd) facilitated a review that aligned the distribution system risk assessment documentation with the affiliated WTP risk assessments and ensured it met Hunter Water’s Enterprise Risk Management (ERM) Framework.


An updated risk profile for the distribution system which identified additional improvements actions required to manage the risk. Subsequently, the Project Team completed an update to Hunter Water’s DWQMS manual to reflect the workshop outcomes and management system changes, as well as streamline and simplify the manual for implementation and auditing purposes.