What to do when a boil water notice is issued in your area?

We understand that a boil water notice is inconvenient however, protecting our residents from health risks is our priority.

When a boil water notice is issued, affected people should continue to boil their water (for at least one minute) until advised the water is safe again.

The boil water notice process:

  1. When contamination occurs in our reticulated network, we first issue a boil water notice to the affected residents via different channels:
    • Letter drops to affected properties
    • E-text or email sent to all affected ratepayers (who have registered their contact details with us)
    • E-text or email sent to the affected non-ratepayers residents who have subscribed to our water alerts
    • Media release which goes to all media outlets plus CDHB, elected members, etc.
    • News story posted on our website
    • Facebook post
  2. The reservoir and reticulation are then chlorinated to disinfect the supply from any possible contamination.
  3. A detailed investigation of network is carried out to identify the source of contamination and manage the issue.
  4. Daily water sampling continues until we confirm three clear sample results, when free of chlorine disinfection.
  5. Once a Boil Water Notice can be lifted, we follow the same steps as outlined in number 1- above to inform the community

Important: residents with a restricted water supply are advised to disinfect their water storage tank(s). Refer to our guidelines [PDF, 33 KB]


How to subscribe to receive our alerts

Ratepayers' contact details

  • Ratepayers contact details are automatically added to our emergency alerts database. If you have shared your mobile phone and/or email address with us; we will use these details to send you boil water notices.
  • To update your contact details, please use our online form to update your ratepayers' contact details.

Resident but not a ratepayer?