Who Will Rebuild Britain’s Water System?

Britain’s model for owning, governing and financing water has failed on its own terms.

It was supposed to combine private capital, capable operators and strong regulation to secure reliable services, sustained investment and improving environmental outcomes. Instead, rivers have been polluted, infrastructure has deteriorated, bills are rising and public confidence has collapsed. Companies responsible for an essential service have continued to pay dividends while struggling to control sewage, leakage and debt. Financial engineering has often appeared more accomplished than the engineering of the water system itself.

The understandable response is to demand that water be returned to public ownership. It may need to be. But nationalisation answers only one question: who should own the water companies?

A functioning water system requires answers to many others. Who will finance the infrastructure, maintain the pipes and protect the catchments? Who decides how much water agriculture, industry and households may use? Who pays for new reservoirs? Who carries the risk when projects go wrong? Who prevents political pressure from holding bills below the level required to maintain the system? Who says no when local opposition collides with national water security?

Changing the shareholder does not answer these questions. It transfers responsibility for answering them.

That distinction matters because water is not merely a commodity delivered through a pipe. It is a natural resource, an essential human need, an ecological system, a network monopoly and an infrastructure service at the same time. Any serious attempt to rebuild Britain’s water system must begin by understanding the whole of that system.

The problem with calling water a public good

In ordinary language, water is obviously a public good. It is essential to life, and secure access to safe water is plainly a matter of public interest. In economics, however, the term has a more specific meaning.

A public good is something one person can use without significantly reducing its availability to another and from which it is difficult to exclude people. A river or aquifer does not quite meet that definition. Water abstracted by one user is no longer available to another, while pollution introduced upstream imposes costs upon users and ecosystems downstream. Rivers, lakes and aquifers are better understood as common resources: shared, finite and vulnerable to overuse.

Some of the benefits produced by a healthy water system are genuine public goods. Biodiversity, flood protection, landscape value and the continued functioning of a river ecosystem benefit people who may never receive a bill or purchase a litre of water. Piped drinking water is different. It can be measured, charged for and consumed. Water used by one household, farm or factory cannot simultaneously be used elsewhere.

The pipe network is different again. It is a natural monopoly. Constructing several competing systems of reservoirs, sewers and water mains would be economically and physically absurd. Consumers cannot meaningfully switch between rival networks. Then there is essential access to safe water, which society rightly treats as a human right rather than something allocated solely to whoever can afford the highest price.

These are not semantic distinctions. They determine how the system should be governed.

Water must be guaranteed as an essential human need and priced as a scarce resource beyond those essential needs. It must be protected as Natural Capital, financed as long-lived Manufactured Capital, operated as a monopoly and governed as a public trust.

Calling water a public good does not mean unlimited water should be free. Free or heavily underpriced water can encourage overconsumption, conceal the depletion of rivers and aquifers and starve infrastructure of investment. Equally, calling water an economic good does not mean it should be allocated only to those able to pay the most. That would ignore essential access, environmental limits and the monopoly power of the network.

Water is too important to be governed solely as private property, too complex to be run as an ordinary government department and too scarce to be treated as free.

That is the beginning of a water policy. Nationalisation, by itself, is not.

The morning after nationalisation

Imagine that Britain brings its water companies into public ownership tomorrow. The shareholders will have changed, but the debt, ageing pipes, damaged rivers, changing climate, shortage of engineers and enormous investment requirement will remain.

Ofwat’s final determination for 2025 to 2030 allowed for approximately £104 billion of expenditure across England and Wales. Whatever one thinks of Ofwat, the companies or the process through which that figure was reached, the physical requirement does not disappear when ownership changes.

Removing dividends could retain more money within the system. Eliminating convoluted corporate structures might reduce financing costs. Public ownership could make it easier to align investment with environmental and social priorities. All of that could be valuable, but it does not follow that removing profit will release enough money to rebuild the water system.

The public owner must still decide how much investment will come from bills, how much from taxation and how much from borrowing. It must still acquire land, materials, technology and specialist labour. It must determine which reservoirs, treatment works and network improvements take priority, and it must defend those choices when they impose costs or encounter opposition.

There is also the difficult question of acquisition. If the state purchases the water companies, how much public money will be spent acquiring financial claims created under the failed model before a single additional reservoir is built or a single river restored?

The public does not escape the cost because the state becomes the borrower. Nationalisation does not make costs disappear. It changes where they appear.

Nor does public ownership guarantee competent operation. Dŵr Cymru Welsh Water has no shareholders and operates on a not-for-profit basis, yet it has still experienced serious environmental and operational failures. Its experience does not prove that removing shareholders is pointless. It demonstrates that a company can remove private profit from its purpose and still fail the river.

Ownership changes incentives, but it does not abolish weak management, poor asset information, regulatory failure, operational complacency or underinvestment. Much of the political argument overlooks this distinction. It identifies the villain, removes the villain and assumes that the missing competence will somehow appear in the space left behind.

But ownership is not engineering. Public purpose is not operational capacity, and removing profit is not the same as creating investment.

What better water systems actually do

Other countries demonstrate that public water can work. They also demonstrate that public ownership is not, by itself, the reason it works.

The Netherlands is perhaps the most instructive example because it has built its institutions around the physical realities of water. Dutch drinking-water companies are publicly owned, municipalities manage sewerage, regional water authorities manage water quality, flood protection and wastewater treatment, and national government establishes the wider legal and strategic framework.

The regional water authorities also possess their own revenue-raising powers. This matters enormously because water management does not have to compete each year with hospitals, schools and defence for whatever central government chooses to allocate. It has institutions, responsibilities and funding mechanisms designed to endure beyond a single political cycle.

The Dutch model recognises that supplying drinking water, treating wastewater, protecting catchments and managing flood risk are connected but distinct responsibilities. It places them within public governance without pretending that one national department must do everything. Its real lesson is not simply that water is publicly owned. It is that durable institutions have been constructed around the hydrological system.

Singapore offers a different lesson. Its national water agency, PUB, manages water as an integrated cycle in which rainfall, reservoirs, imported water, desalination and recycled wastewater form a deliberately diversified supply system. Used water is not treated simply as waste to be removed. Through NEWater, it becomes a strategic resource.

Singapore also refuses the politically convenient fiction that public ownership makes water costless. Water prices reflect the cost of supply and production, while the pricing system recognises scarcity and encourages households and industry to conserve the resource. Support can be directed towards people who need it without falsifying the price of water for everyone.

This is public ownership combined with economic seriousness. Scarcity is communicated rather than concealed, consumption is managed, technology is funded, wastewater is treated as recoverable capital and the system is planned decades ahead.

Paris demonstrates that a private water service can return successfully to public operation. When the city’s contracts with private operators expired, it consolidated production and distribution under Eau de Paris. Removing dividends and contractual interfaces allowed more of the system’s revenues to remain within the service.

But Paris did not simply acquire a collection of heavily indebted regional companies and hope that public ownership would resolve their underlying problems. Contracts were allowed to expire, a municipal operator was established and the transition had an identifiable legal and institutional route.

Berlin provides the corresponding warning. After partially privatising its water utility, the city later bought the private stakes back. Public control was restored, but at substantial cost. The borrowing required to reacquire the system ultimately had to be serviced through water revenues.

Paris and Berlin show that remunicipalisation can work, but they also show that the transition matters. Buying back the financial claims created by privatisation may consume capital that could otherwise have repaired the physical system. The public can end up paying once for the failure of privatisation and again for the infrastructure neglected under it.

Public ownership can be the destination. It is not an implementation plan.

The system beneath the company

The deeper mistake is to imagine that Britain’s water crisis is confined to the water companies. Those companies sit within a much larger system of rivers, catchments, aquifers, reservoirs, pipes, treatment works, regulators, engineering capability, household demand, agricultural use, industrial consumption and public trust.

The financial accounts capture only a fraction of this system. They record debt, operating costs, customer revenues, profits, dividends and capital expenditure. They do not adequately record the deterioration of a river, the depletion of an aquifer, the loss of ecological resilience, the condition of skills within the workforce, the quality of the knowledge informing investment or the erosion of public consent.

Britain did not merely permit too much Financial Capital to leave its water companies. It failed to maintain the other forms of capital upon which a functioning water system depends.

Manufactured Capital deteriorated through ageing pipes, inadequate treatment capacity, insufficient storage and the repeated deferral of essential investment. Natural Capital deteriorated through polluted rivers, depleted aquifers, damaged catchments and the loss of wetlands capable of retaining, cleaning and gradually releasing water.

Human Capital weakened as engineering, operational and regulatory capability failed to keep pace with the demands placed upon the system. Social Capital declined as responsibility became fragmented across companies, regulators and government, and as public trust was eroded each time customers were asked to accept higher bills while sewage entered rivers and executive rewards continued.

Intellectual Capital was also neglected. Asset knowledge remained incomplete, monitoring systems were inadequate, long-term planning repeatedly gave way to shorter political and financial cycles, and valuable scientific and operational information was not consistently translated into better decisions.

Financial Capital, meanwhile, was treated both as the principal measure of performance and as the dominant claim upon the system. Debt, revenues, profits, dividends and capital expenditure were recorded with precision, while the deterioration of the other capitals was either weakly measured or left outside the account altogether.

The financial result did not sit apart from these losses. It was partly produced by them.

Profit could be reported because the deterioration of the wider capital system was not fully recognised in the accounts. A company could therefore appear financially viable while the natural systems, physical infrastructure, institutional relationships, knowledge and human capability supporting it became less resilient and less trusted.

This is not unique to water. It is a recurring feature of an economy that records the financial result while leaving much of what made that result possible outside the account. Changing ownership may improve the incentives governing Financial Capital, but it does not automatically restore the Natural, Human, Social, Intellectual or Manufactured Capital that has been lost.

How water should be governed

Britain does not merely need a different owner for its water companies. It needs enduring principles and institutions governing the water system: ones that clearly establish who holds the resource in trust, who operates and maintains the infrastructure, how ecological limits are enforced, how essential access is guaranteed and how long-term investment is protected from short-term political and financial pressures.

The resource itself should be held in public trust. Rivers, aquifers, catchments and the ecological processes that replenish and purify water were not created by water companies, landowners or governments. They are part of the common inheritance upon which households, agriculture, industry and nature depend.

That does not mean water has no economic value. It means its value cannot be reduced to the right of one owner to extract it.

Abstraction and pollution must therefore be governed within enforceable ecological limits. The needs of households, agriculture, industry, future resilience and the living system itself must be reconciled openly. The first claim cannot simply belong to whoever can abstract the most or pay the highest price.

The permanent strategic infrastructure should also remain under unambiguous public control. Reservoirs, pipes, sewers and treatment works form an essential monopoly network. They should not become instruments through which owners extract returns from customers who have nowhere else to go.

A publicly owned regional water authority could own and operate that network within each appropriate hydrological region. Its mandate would cover reliable supply, wastewater treatment, infrastructure resilience and long-term asset stewardship. A separate catchment authority could protect and allocate the underlying resource, establish abstraction limits, enforce pollution rules and account for the condition of rivers, aquifers and ecosystems. The operator should not be permitted to regulate its own demands upon the resource.

An independent economic regulator would still be required to scrutinise costs, investment, service quality, asset condition and executive remuneration. Parliament would establish the national duties relating to essential access, ecological protection and long-term resilience.

The responsibilities should be distinct, but the accountability must remain visible. Institutional variety can easily become camouflage. A maze of owners, regulators, consultants, contractors and concessions creates precisely the ambiguity in which responsibility dissolves. Money passes through the system while each participant explains why the failure belongs to somebody else.

Britain has already experienced enough of that.

Private companies can still play a useful role. They can construct reservoirs, repair pipes, develop monitoring systems and supply treatment technologies. Their contracts should be transparent, competitively tendered, time-limited and cancellable for non-performance. Private participation can contribute expertise and innovation without granting private firms control over the resource, the strategic network or the customer relationship.

Private firms may work for the water system. They should not govern it.

Who pays?

The honest answer is that households, businesses, land users and taxpayers will all pay, in different proportions and for different reasons. The dishonest answer is that somebody else will.

Every household should be guaranteed an affordable quantity of safe water sufficient for essential needs. Nobody should be denied access to water because they lack the financial means to pay for it. Beyond that essential provision, however, prices should reflect the real cost of treatment, infrastructure, scarcity and ecological pressure.

Large and water-intensive users should face the consequences of their demand. Polluters should contribute to the cost of restoration. Landowners, developers and businesses benefiting from flood protection or improved catchments should help finance those benefits.

The OECD’s user-pays, polluter-pays and beneficiary-pays principles are useful because they recognise that water has several sources of cost and value. The entire burden should not be loaded indiscriminately onto household bills or general taxation.

We should ensure that those lacking the financial resources to meet the full cost retain secure access to essential water, without pretending that water itself is abundant or costless. Artificially low prices can encourage waste, conceal depletion and deprive infrastructure of investment. A publicly owned system can be degraded through politically expedient underpricing just as effectively as a privately owned system can be degraded through financial extraction.

The difficult truth is that cleaner rivers, greater resilience, lower bills and vastly increased investment cannot all be promised simultaneously without explaining the resources and trade-offs required to achieve them. There may be ways to reduce unnecessary financing costs, eliminate extraction, improve efficiency and allocate burdens more fairly, but none of these eliminates the underlying physical cost of rebuilding the system.

To govern is to choose. The public deserves to know what those choices are.

The account we actually need

A credible water balance sheet would report far more than profit, debt and capital expenditure. It would show the condition and expected life of pipes, reservoirs and treatment works, while reporting leakage, capacity constraints and the resilience of supply under different climate scenarios.

It would also show the condition of rivers, aquifers, wetlands and catchments, identifying whether the natural systems upon which supply depends are improving or deteriorating. It would report the availability of engineers, operators and specialist contractors required to deliver the investment plan. It would record delivery performance and distinguish expenditure announced from infrastructure actually completed.

The account would reveal the strength of the relationships and institutions governing the system, including whether responsibilities are clear, regulation is effective and public confidence is being rebuilt or further depleted. It would also assess the condition of the information upon which decisions depend: the completeness of asset records, the quality of monitoring, the assumptions within demand forecasts and the ability to translate scientific knowledge into practical intervention.

Most importantly, it would show how much value enters the system through bills, taxation and borrowing, where that value goes and which forms of capital it creates, maintains or restores. It would recognise the liabilities being passed forward, not simply as Financial Capital in the form of debt, but as deteriorating Manufactured Capital, depleted Natural Capital, weakened Human and Social Capital, inadequate Intellectual Capital and reduced resilience across the system as a whole.

This need not remain a theoretical account. It can be designed, populated and used to inform real decisions. This is precisely the kind of expanded account that we developed Value2Society to create. It would give water companies, regulators and government a common operating view of the whole value system, connecting financial flows to the condition of infrastructure, ecosystems, capabilities, knowledge and public trust. It could reveal not only what has been spent, but what that expenditure has maintained or restored; not only what the system currently costs, but where its greatest liabilities are accumulating and its greatest opportunities for future value lie.

In practice, it would become a decision system: determining where investment is most needed, which interventions create the greatest value, what remains at risk and whether today’s choices are rebuilding the foundations upon which tomorrow’s water supply depends.

**If Britain’s water companies, regulators or government are serious about constructing such an account, Route2 would be very happy to help design and build it.**

Without this wider account, a future public operator could reproduce a familiar political habit. Bills could be held down, difficult investment deferred and the short-term saving celebrated, while the physical, ecological and institutional costs were passed to whoever governed next.

Public ownership would then change the name above the account while leaving its boundaries untouched.

Possession is not competence

There is a serious case for returning Britain’s water system to public ownership. The current model has allowed private financial interests to exercise too much control over an essential monopoly, while governments and regulators retained too little effective responsibility for the long-term condition of the resource and infrastructure.

But public ownership must be the beginning of reform, not its conclusion.

The test of any proposal is what happens the morning after ownership changes. Who runs the system, protects the resource and finances the investment? Who carries the risk? What gets built first? How are essential needs protected while scarcity is still reflected? What happens when national resilience conflicts with local opposition? How is failure exposed, and who can be removed when it occurs?

These questions are difficult because water contains real competing claims. Answering them requires engineering, finance, ecological knowledge, institutional capability and political courage. It requires more than identifying a failure, selecting a villain and treating the villain’s removal as though it creates the capacity that was missing.

The Independent Water Commission concluded that England and Wales require major structural change, a long-term national strategy and a clearer system for governing competing demands upon water. That is closer to the scale of the problem. Yet even a new strategy and regulatory architecture will succeed only if they are attached to protected finance, visible responsibility and the capacity to deliver.

Any political party that believes transferring ownership completes the work of reform has confused possession with competence. It has not produced a water policy. It has merely selected a shareholder.

Rebuilding the system requires an account of the resource, infrastructure, institutions, knowledge, finance and competing claims upon them. It requires an honest explanation of who pays, who benefits, what must be protected and what cannot continue. Above all, it requires us to recognise that the Financial Capital recorded by the water companies is only one component of the value system upon which clean and secure water depends.

Those who promise cheaper bills, cleaner rivers and greater investment without explaining how these aims will be reconciled do not yet possess a radical alternative.

They are still learning how a water system works.

This essay began as a line of enquiry developed through the work on Value2Society. ChatGPT was used as a thinking and editorial partner, testing the argument, challenging its edges and helping shape it for publication.