Three Waters and Local Water Done Well were fiercely debated. The future water demands of data centres and other large industrial developments received far less public attention.
New Zealand has spent years arguing about who should manage drinking water, wastewater, and stormwater.
Labour proposed Three Waters, later renamed Affordable Water Reform. The National-led Government repealed that legislation and replaced it with Local Water Done Well. The debate was fierce.
It covered ownership, co-governance, council control, debt, regional entities, and whether decisions should sit locally or centrally. But one future-facing question received far less public attention.
What kinds of demand are we building the new water system to serve?
Water infrastructure lasts for decades. The decisions councils make now will affect what can be built, what households pay, and which uses receive priority during shortages.
At the same time, New Zealand is encouraging investment in artificial intelligence, cloud infrastructure, data centres, and other electricity-intensive developments.
Here is where the water debate becomes more interesting.
Some data centres use water for cooling, while others use different systems and may place much less direct pressure on drinking water supplies.
Their impact depends on the project, which is exactly why the public needs to see the expected demand, infrastructure costs, funding arrangements, and shortage plans before decisions are made.
What Local Water Done Well changes
Under Local Water Done Well, councils could continue delivering water services directly, establish council-controlled water organisations, join with other councils, or use other permitted structures.
The Government said the changes would improve access to finance and allow infrastructure costs to be spread over the useful life of the assets. By December 2025, councils’ water service plans identified an estimated $47.9 billion of investment.
That is a significant infrastructure programme. It will shape household charges, council debt, investment priorities, and the capacity available for future growth.
In some models, water charges may sit outside the council’s general rates bill and outside measures that focus only on council rates increases - However, that does not make the cost disappear.
It changes where the charge appears, who sets it, how the borrowing is managed, and how clearly households can see the combined cost.
A household may face a council rates increase and a separate water charge. Public reporting should show the total effect clearly.
You can learn more about the potential household costs through our free “Local Water Done Well” calculator here
The Government has repeatedly said councils will retain public ownership and control. But what they don’t tell you is that ownership is only one part of control.
The public also needs to understand:
Who borrows the money?
Who sets the charges?
Who carries the financial risk?
Who decides which infrastructure is built first?
What conditions are attached to new financing?
What long-term service or operating contracts are being signed?
What happens when a large industrial development needs capacity that does not currently exist?
Can future councils change direction without facing major financial or contractual penalties?
These questions matter regardless of which political party designed the system.
Is Water Reform Connected to Data Centres?
We have not found evidence that Three Waters or Local Water Done Well was created specifically to support artificial intelligence data centres. That is not the claim we are making, but what we’re raising the question about is whether New Zealand’s water policies and its support for new digital infrastructure may interact.
New Zealand is encouraging investment in data centres at the same time councils are restructuring water services and planning tens of billions of dollars in infrastructure spending.
Some data centres may require water for cooling. Some may need new bores, pipes, wastewater systems, treatment capacity, or supporting infrastructure.
Others may use closed-loop or air-based cooling systems and place little direct pressure on drinking water supplies.
The impact depends on:
The size of the development
The cooling technology used
The local climate
The source of the water
The existing infrastructure
Whether water is reused
What happens during droughts or shortages
Whether the facility expands after the original approval
That is why generic assurances are not enough. The public needs project-specific information and national rules requiring that information to be disclosed.
Ownership Is Only One Part of Control
The word “privatisation” can hide several different questions.
It may mean selling publicly owned assets.
It may also be used to describe private companies financing, operating, maintaining, advising on, or profiting from essential infrastructure while legal ownership remains public.
Private companies already build and maintain public infrastructure. That is not automatically privatisation, and it is not automatically a problem.
The public-interest question is whether everyday New Zealanders can:
See the terms
Understand the risks
Follow the money
Challenge the assumptions
Identify who holds decision-making power
Hold elected representatives responsible for the outcome
Practical control can be shaped by more than the name on an ownership document.
It can also be shaped by:
Debt obligations
Financing conditions
Long-term operating contracts
Pricing requirements
Service agreements
Infrastructure commitments made to large customers
The legal and financial consequences of changing direction later
A council can retain legal ownership while limiting its future choices through debt, contracts, pricing obligations, or infrastructure commitments.
Public ownership is an important safeguard, however it is not a substitute for transparent decision-making.
What should have been discussed
During the political fight over water reform, every major proposal should have addressed the demand New Zealand may face over the next 10, 20, and 30 years.
That discussion should have included questions such as:
How much additional industrial water demand is expected?
Do the forecasts include data centres and artificial intelligence infrastructure?
Which regions may face competition between household, agricultural, industrial, and environmental needs?
Will large industrial customers pay the full cost of the infrastructure required to serve them?
Could households subsidise industrial growth through higher fixed charges or shared borrowing?
What information must councils publish before committing water capacity to a major development?
Who receives priority during drought restrictions?
How will communities participate before long-term contracts or infrastructure commitments are made?
What happens if a development uses more water than originally forecast?
What happens if the jobs, investment, or other benefits do not match what was promised?
Every political party should be able to answer these questions before asking for the public’s vote.
The water system will outlast any one government.
Water decisions do not happen in one room
A major industrial development may pass through several separate processes.
A council may assess planning and local infrastructure.
A regional council may consider water use, discharges, and environmental effects.
A water organisation may assess capacity and future investment.
Electricity companies may consider connections and demand.
Developers, consultants, financiers, and government agencies may hold other parts of the picture.
Each organisation may examine the issue within its own responsibilities, each may be doing its assigned job properly and that does not mean anyone is required to assess the total effect.
The public may see a planning application or consultation document only after the developer and relevant organisations have spent months or years shaping the proposal. By that stage, important assumptions may already be embedded in reports, infrastructure plans, financial models, and preferred options. The organisations involved earliest have the greatest opportunity to shape how the decision is understood.
They may arrive with specialist advisers, consultants, lawyers, forecasts, and established relationships. Most communities do not.
That does not mean every official, adviser, councillor, or MP is corrupt. It means access is uneven.
Elected members often rely heavily on the reports, recommendations, and specialist advice placed in front of them. That is understandable when they are dealing with complex infrastructure, limited time, and technical information.
The deeper problem arises when those assumptions are not tested.
Were alternatives considered?
Was the developer’s information independently checked?
Were long-term costs included?
Were risks explained clearly?
Was the public shown the same information as the decision-makers?
Was consultation held early enough to influence the outcome?
This is the access gap Lobby for Good exists to expose.
The people with the most resources often understand the sequence, the dependencies, and the long-term commercial value before everyday New Zealanders know a decision is being considered.
What every major water-dependent proposal should disclose
Before a council or water organisation commits public capacity or infrastructure to a major commercial development, the public should be able to see one clear account of:
The development’s forecast water demand
The source and reliability of that forecast
The proposed water source
The cooling system or industrial process involved
The infrastructure upgrades required
Who will build, fund, own, and maintain that infrastructure
The full allocation of costs
The effect on households and existing consumers
The rules that apply during droughts and emergencies
Any long-term financing, operating, or service agreements
The alternatives considered
The consultants, advisers, and external organisations involved
The benefits promised
How those benefits will be measured
The final votes and reasons for the decision
What happens if the development expands, closes, or fails to deliver what was promised
These are not anti-business demands - they are the minimum information needed to assess whether the costs, benefits, and risks have been allocated fairly.
Good businesses should be able to explain what they need, what they will contribute, and what the community will receive in return.
The records must remain accessible
Public records matter because one project may appear reasonable on its own. A pattern across several councils may tell a different story.
It may show the same assumptions being used, the same advisers appearing, the same costs being shifted, or the same information missing from public reports. But people cannot identify those patterns if the records are difficult or expensive to obtain.
Information requests can attract charges when agencies say substantial collation or research is required. That can place important public records beyond the reach of people without organisational backing.
Where a major decision affects public infrastructure, the core reports, assumptions, financial models, meeting records, and supporting evidence should be published proactively.
Everyday New Zealanders should not have to pay to reconstruct a decision that affects their rates, water supply, community, or future infrastructure.
Water belongs in the AI infrastructure conversation
We do not yet know whether artificial intelligence infrastructure will become a major user of New Zealand’s water.
Its impact will depend on where facilities are built, how they are cooled, which water sources they use, how large they become, and what infrastructure already exists.
We do know that water services are being reorganised while new industrial developments are being encouraged.
We also know that infrastructure decisions made now may shape what councils can afford, what households pay, and which uses receive priority for decades.
That is enough reason to require clear, project-specific information before public capacity or money is committed.
We should not oppose a development simply because it is new.
We should not approve it simply because it is described as investment, innovation, or progress.
The public standard should be clear:
Show us the expected demand.
Show us the infrastructure required.
Show us who pays.
Show us what happens during shortages.
Show us what the community receives.
Then give the people affected a meaningful chance to participate before the important commitments have already been made.
But water is only one part of the picture.
A data centre may also involve cloud procurement, overseas investment, land, electricity generation, grid connections, roads, fibre, and long-term government reliance on international providers.
Those decisions are often considered by different organisations through different processes.
In Part two, we ask the wider question: when each organisation sees only one part, who is responsible for assessing what all the decisions add up to?
Read Part two: AI data centres are becoming national infrastructure. Who is checking the whole picture?
Help us build the public record
Is a data centre or another large water-dependent development being proposed near you?
Have you seen a council report, consent notice, infrastructure agreement, meeting record, or public presentation?
Send us the source document through the Lobby for Good Civic Tools
Tell us:
Where the development is proposed
Which council or agency is involved
What stage the proposal has reached
What water information has been disclosed
What infrastructure is required
What questions remain unanswered
One local report may describe one development.
Reports from several regions may reveal a national pattern.
This is how civic intelligence is built.
We will not treat a submitted report as an established Lobby for Good finding without review. We will not publish personal information without an appropriate basis and consent.
Why membership matters
Following decisions like these requires more than reading the announcement.
It means finding the reports, checking the assumptions, requesting missing records, comparing decisions across regions, and tracking what happens after approval.
Lobby for Good members help fund that work and keep public-interest information accessible.
Join Lobby for Good and help build the people’s lobby.
No one should have to fight alone.