Reporting issues
For now, continue to contact your local council for any water-related issues. You will be informed of any changes to the best point of contact from 1 July 2026 when responsibility for water services transfers to Tiaki Wai.
(October 2025)
About Tiaki Wai
Tiaki Wai is a council-owned company that is established as a water organisation under the Local Government (Water Services) Act 2025.
As a water organisation, Tiaki Wai is limited to providing drinking water supply, wastewater and stormwater services to the Wellington metropolitan area. Tiaki Wai must retain ownership and control of the water services infrastructure and assets, and it must comply with strict financial principles. The shareholding councils have stated in the foundation documents that no dividends will be paid, meaning any surplus must be reinvested.
Find out more in the foundation documents:
- Constitution
- Partners Agreement
- Statement of Expectations
Further information about water organisations can be found here.
Tiaki Wai is also subject to the:
Tiaki Wai will be different to Wellington Water because it will operate with more independence. Unlike Wellington Water, from 1 July 2026, Tiaki Wai will:
- Own water assets and infrastructure (transferred from five councils: Greater Wellington, Wellington City, Porirua City, Hutt City, and Upper Hutt City).
- Bill directly for water services, separate to council rates. Independent funding means Tiaki Wai can make more prioritised, sustainable investment and borrowing decisions.
- Operate independently from council’s competing priorities, and their planning, funding, and electoral cycles, meaning Tiaki Wai can have a singular focus on providing safe, reliable, environmentally and financially sustainable water services.
In time, Tiaki Wai will also communicate with customers directly, which will make it more responsive and customer focused.
With greater borrowing capacity and a regional view, Tiaki Wai will be better set up to provide drinking water, manage wastewater, and manage piped stormwater for current and future communities.
To ensure critical work continues and institutional knowledge isn’t lost, Wellington Water staff will be transferred to Tiaki Wai.
Tiaki Wai will be responsive to its customers. It will be overseen by a Partners Committee made up of councils that represent our communities and mana whenua (Taranaki Whānui ki te Upoko o Te Ika and Ngāti Toa Rangatira).
Alongside this, there will also be increased economic and water quality regulation. Some examples of this include:
- The Commerce Commission will monitor compliance with economic regulations in relation to quality, customer protection and price.
- The Water Service Authority – Taumata Arowai –– will ensure compliance with drinking and wastewater standards.
- Greater Wellington Regional Council will continue to oversee environmental compliance.
- The Department of Internal Affairs will monitor and seek assurance that Tiaki Wai is financially sustainable and meets the obligations of water services legislation.
Representatives from our five shareholding councils sit on the Partners Committee, which provides governance oversight of Tiaki Wai. Through the Statement of Expectations (SOE), the Partners Committee sets the high-level direction for Tiaki Wai, reflecting the needs and priorities of their communities.
How that direction is delivered is up to Tiaki Wai. Its approach to meeting the expectations set out in the SOE will be set out in the Water Services Strategy, which will be published before 1 July 2026.
From 1 July, councils will no longer decide funding for individual projects or programmes, set annual water budgets, or determine what people pay for water services. These decisions will be made by Tiaki Wai.
Tiaki Wai will need to maintain close and ongoing working relationships with councils as we deliver on services and maintain the network. This includes where there are services or functions that require collaboration, like management of stormwater and urban planning.
Representatives from mana whenua (Taranaki Whānui ki te Upoko o Te Ika and Ngāti Toa Rangatira) sit on our Partners Committee along with representatives from our shareholding councils.
They will contribute to setting the high-level direction for Tiaki Wai through our Statement of Expectations, reflecting the needs and priorities of their communities. Through the Partners committee they also have a role in oversight of Tiaki Wai.
You can read about the role and specific responsibilities of the Partners Committee in their terms of reference published on the Hutt City Council website.
Tiaki Wai will need to maintain close and ongoing working relationships with mana whenua as we deliver on services and maintain the network.
See your local council’s website for the background and decisions made in this space:
Yes. Our draft Water Services Strategy, Significance and Engagement Policy, and Customer Charter are currently live and open for public engagement (until 22 April 2026).
Click here to find out more: https://haveyoursay.tiakiwai.co.nz/
The legal name Tiaki Wai reflects that the organisation is a partnership between shareholding councils and mana whenua iwi Ngāti Toa Rangatira and Taranaki Whānui ki Te Upoko o Te Ika.
Tiaki Wai in Te Reo Māori means 'carers for water'. This name captures the intent to deliver safe, reliable, environmentally and financially sustainable water services in a way that restores te mana o te wai. The name has been gifted by mana whenua.
Click here to read more about our name and visual identity.
Initially, our name was 'Tiaki Wai Metro Water'. The decision to shorten the official name was made by the Tiaki Wai Board after consultation with shareholding councils and mana whenua. This interim website was created before that decision was made and the URL - https://www.tiakiwaimetro.co.nz - will continue to be used until 1 July 2026.
The email domain @metrowaterwellington was set up in early 2025, before the name Tiaki Wai was confirmed. The team working on establishing Tiaki Wai will continue to use this email address until 1 July 2026.
Customer service and charging
Yes. Currently, you are paying for water services as part of council rates bills. From 1 July 2026, rates will continue to be billed by councils, but you will also receive a separate bill from Tiaki Wai specifically for water services.
You will start receiving water service bills separate from your council rates bill from 1 July 2026. Although there will be separate bills, they will arrive at around the same time.
Property owners are already paying for water through their rates. On average across the four cities in the current year, property owners paid an average of $2100 a year, or about $40 a week, through their rates for water services. This figure is an average across the region so some places are paying lower amounts, and some higher.
From 1 July 2026, property owners will be responsible for paying the cost of water services directly to Tiaki Wai, rather than through rates.
Your water services bill covers costs for the infrastructure networks that supply clean water to your property that’s safe to drink, remove wastewater from your sinks and toilets, and take away the stormwater from your downpipes and the streets and other public areas.
This includes the day-to-day operation and maintenance of pipes, pump stations, drinking water and wastewater treatment plants, and associated infrastructure. Water service charges will also fund long-term investments in renewals, upgrades, and new infrastructure to help with leak reduction, improved wastewater treatment, and the resilience of the network.
Your water services bill pays for the infrastructure that supplies the water, not the water itself.
Over time, customer charges will increase, to meet the cost of delivering reliable and sustainable water services.
For the first financial year (2026/27), property owners can expect water charges to be broadly in line with what they would have paid as part of their rates bill. This will include increases projected in your council’s Long-Term Plan.
The Water Services Delivery Plan forecasts that average residential charges will rise from $2,100 per connection today to between $4,800 and $5,700 by 2034. These numbers are estimates and will evolve as Tiaki Wai develops and refines its plans.
The exact amount to be charged each year depends on the pace of delivering maintenance and upgrades, and the level of cost recovery from new developments.
The forecast cost increases are around a third less than increases likely if the status quo continued, because of greater borrowing capacity and efficiency gains, but will still present a challenge for many households. Tiaki Wai will be considering options to help low-income households manage the cost of water services.
Your rates bill will decrease to reflect the removal of water service charges. However, this does not mean your overall household costs will reduce.
For the first financial year, council rates and water charges are expected to continue increase in line with the projected increases set out in your council’s Long-Term Plan.
Our approach to calculating water charges will develop over several years.
Currently, water service charges are billed as part of council rates bills. The way rates are calculated differs between councils, which means that households and commercial water users pay different amounts depending on which council area they are in.
For the first year from 1 July, the exact amount of a water service bill from Tiaki Wai will vary from city to city and property to property, in the same way rates vary; because initially Tiaki Wai is using much the same approach as councils to calculate water services charges.
This approach provides continuity during the establishment of Tiaki Wai and removes the need to create a new charging model for the first year of operations. Prices will then move toward a more consistent regional structure where water charges are ‘harmonised’ across the takiwā (territory) by no later than 1 July 2031.
Harmonisation will mean similar value properties will be charged a similar amount for water services, regardless of where the properties are located. This will enable Tiaki Wai to invest in activity based on where the highest need is across the takiwā, providing greater transparency for customers. How and when this transition to a harmonised approach takes place will be analysed and consulted on through the 2027-37 Strategy.
Later, it is expected that there will be a transition to volumetric charging, which means that residential water meters will be installed and charges will be based on the amount of water used. It is likely that wastewater and stormwater will continue to operate as a mostly fixed-charge service.
For more information on our financial strategy, see the draft Water Services Strategy (page 43).
The exact amount will vary from city to city and property to property, in the same way rates vary, because for the first year from 1 July 2026, Tiaki Wai is using much the same approach as councils to calculate charges.
Across the four cities, average water services charges in 2026/27 will increase by about 14.7%. The current average residential water charges paid through rates across the four cities is $2100 and this will increase by around $310 (about $6 a week).
For more information on charges for 2026/27, see Tiaki Wai at a glance and the Water Services Strategy on the Have Your Say website.
Updated figures will be provided before 30 June 2026. The first Tiaki Wai bill for water services is due to be sent in late July/early August 2026.
Charges need to rise because the region’s water infrastructure has been under-funded for decades and now requires major work. Around $6.8 billion over 10 years (and $25 billion over 30 years) is needed to replace aging pipes, meet modern standards, and support growth. Without higher charges, essential work won’t be able to be done.
We recognise that rising water services costs will be a challenge for some households. Options will be available for those requiring extra support. Our draft Debtors' Management and Hardship Policy is currently available to view here.
Paying your water services bill
You will have options for paying your Tiaki Wai water services bill – direct debit, online banking or over the counter.
If you choose to pay by direct debit, you will need to set up a new direct debit authority before your first payment is due.
We’re still setting up the details, and information will be provided direct to bill payers once arrangements are finalised and in place, likely April.
If you have a current direct debit authority for your rates, that will continue.
(February 2026)
Yes. We are still setting up the details, and information will be provided direct to bill payers once arrangements are finalised and in place, likely April.
(February 2026)
Water assets and infrastructure
On 1 July 2026, water network infrastructure will be transferred from council ownership to Tiaki Wai. Because Tiaki Wai will be owned by five shareholding councils, water assets remain in public ownership.
No. Protections against asset sales and privatisation of the company are embedded into the Tiaki Wai constitution and Partners Agreement. Legislation also further prevents privatisation and because Tiaki Wai is owned by councils, assets will remain in public ownership.
From 1 July 2026, all publicly owned assets that support the provision of water services will be transferred to Tiaki Wai.
This will include publicly owned assets on Council owned land as well as freehold (privately owned) property.
Where any public assets are located on private property, Tiaki Wai will take over any existing agreements or arrangements on the same terms. For example, this could involve Tiaki Wai taking over the rights associated with any water easements that are registered on private property. This will not alter anything associated with the ownership of land.
No. Where any publicly owned water assets transfer to Tiaki Wai, there will be no need for private landowners to be involved. This is because the legal transfer will be between the Councils (as current owners) and Tiaki Wai, as the new water organisation that will become the owner of all water services assets.
Water meters
Yes. This will take several years to implement.
To inform our approach to rolling out water meters, Tiaki Wai will be looking at the potential for pilots to test and learn. Full implementation across the takiwā (territory) is expected to take approximately five to seven years.
Meters are central to managing demand and deferring the need for costly new water sources. They help customers understand and manage their water use. They also help with finding network leaks and private property leaks more quickly. Meters also allow for volumetric charging; that is, paying a charge based on the amount of water used. Some of our customers –– such as commercial water users –– are already using water meters and are billed for services based on volumetric charging.
Read more about our approach to introducing water meters in the Water Services Strategy: https://haveyoursay.tiakiwai.co.nz/water-services-strategy
You can expect to continue to receive separate volumetric/ metered water invoices on the same frequency that you receive them from your council currently; but from 1 July 2026, they will be from Tiaki Wai.
You will also need to pay Tiaki Wai separately for other water service-related charges that have up until now been part of your rates bill (e.g., wastewater and stormwater). This means that, from 1 July 2026, you will get three separate bills: one for non-water related rates from your council, one for water services from Tiaki Wai, and one for volumetric water charges, also from Tiaki Wai.
Renters
As the property owner (and ratepayer), a landlord is currently responsible for paying for water services via council rates invoices. From 1 July 2026, the property owner/landlord will continue to be responsible for paying for water services, through water charges set by Tiaki Wai.
This will not change any arrangements for tenants, as it is the property owner that will receive invoices for water charges.
Have a discussion with your landlord if you are interested in how water service costs are factored into rent.
Rural customers
Tiaki Wai recognises rural customers get different level of service to urban customers.
Tiaki Wai are working through pricing and charging details and are aware that some rural properties will not receive any services from Tiaki Wai. Planning is underway with final decisions still to be made. Further details on pricing will be available in the Water Services Strategy. The public will be able to view the draft Water Services Strategy and provide feedback from 25 March 2026.
Developers
Yes, Tiaki Wai will continue to charge development contributions, based on the existing policies of each shareholding council. This will apply to consent and connection applications made after 1 July 2026.