South Africa’s water problem is becoming an information problem

The latest WMO State of Global Water Resources report released on 17 September 2026, is not a South African water strategy. It does not tell Rand Water, municipalities, industry or national government what to do next. It is a global scientific assessment, and it is mostly retrospective. That limitation is important.

But the report is still useful for South Africa, because it confirms a shift that water managers and large water users already experience in practice: water risk is becoming less predictable, less localised, and less easily understood from one indicator at a time.

We are used to discussing South Africa’s water challenge in familiar terms: ageing infrastructure, failing wastewater systems, municipal under-capacity, non-revenue water, delayed investment, intermittent supply, drought and floods. These remain real problems. But the WMO report points to a deeper challenge. The problem is not only whether there is enough water. It is whether the water system can see change early enough, interpret it correctly, and act before stress becomes failure.

That is a knowledge and coordination problem as much as an infrastructure problem.

Globally, the report shows that abnormal hydrological conditions are no longer exceptional. The share of global basin area experiencing normal river discharge has remained below the historical mean for seven years. Terrestrial water storage has shown a persistent decline since the middle of the previous decade. At the same time, the report also shows large regional contrasts. Some basins are too dry, some are too wet, and some experience damaging variability rather than a simple trend in one direction.

This matters for South Africa because our public conversation often treats water security as if it can be read from a single visible signal. If dams are full, we relax. If rivers are low, we worry. If rain falls heavily, we assume the crisis has passed. If there is a water interruption, we assume infrastructure has failed.

Reality is less tidy.

The WMO report notes that in 2025 much-above-normal precipitation affected the Limpopo and Orange basins, and that extreme precipitation events were observed across parts of southern Africa. It also records above-normal flows in the Orange and Limpopo basins. Yet the report also notes that reservoirs in the Orange River basin showed normal to below-normal storage despite above-normal inflow anomalies, likely because of reservoir operations, withdrawals and the timing of inflow events.

That single finding is a useful warning against simplistic interpretation. More rain does not automatically mean more water security. More inflow does not automatically mean more stored water. Stored water does not automatically mean reliable supply. And reliable bulk supply does not automatically translate into reliable municipal distribution.

Between rainfall and a functioning tap lies a long institutional and infrastructural chain: catchment condition, runoff, inflows, reservoir operation, abstraction, treatment, pumping, storage, municipal networks, demand behaviour, maintenance and communication. Weakness anywhere in that chain can convert a favourable hydrological year into a service-risk year.

This is where the Rand Water–University of Pretoria Hub can add value.

The Hub should not try to be another commentator on “the water crisis”. South Africa has many of those. Its role should be more specific: to help turn hydrological information into decisions that are useful for utilities, municipalities, industry and public institutions. That means working at the interface between science and operations.

The WMO report also highlights a second issue that deserves more attention in South Africa: groundwater. Groundwater is often treated as a fallback option, especially during local shortages. It is less visible than dams and rivers, and therefore easier to ignore until it is already under stress. The report identifies persistent groundwater deficits in several regions, including northern South Africa, and notes that groundwater conditions reflect both climate variability and over-abstraction.

That should concern us. Groundwater can be a strategic buffer, but only if it is monitored and governed as part of the wider water system. If every municipality, farmer, business park or household turns to groundwater as an unmanaged private insurance policy, the buffer can become another delayed failure.

The third issue is data. The WMO report has improved significantly over five years, expanding the number of hydrological variables it assesses and increasing the number of countries contributing data. Yet Africa and Asia remain underrepresented in the observational record. This is not a technical footnote. It has real consequences. Regions with weaker monitoring capacity are also often regions where droughts, floods, groundwater depletion, pollution and service failures have the greatest social and economic consequences.

Poor data does not make water risk disappear. It makes it harder to price, harder to manage, harder to insure, harder to regulate, and harder to explain to the public.

For South African business, this means water risk should not be treated only as a sustainability disclosure issue. It belongs in operational risk, credit risk, food-system planning, mining, manufacturing, health care, education, property development and municipal engagement. The practical question for a firm is not simply whether the country is water scarce. It is where water enters the value chain, what fails first under stress, whether municipal supply is a single point of failure, and whether management has credible triggers for action before restrictions or outages arrive.

For public institutions, the implication is equally direct. Water reform cannot succeed if infrastructure investment, data systems, municipal capability, demand management and water-quality monitoring are treated as separate conversations. They are the same conversation viewed from different points in the system.

A useful South African response to the WMO report would therefore not be another generic call for resilience. It would be a more disciplined water-intelligence agenda.

Such an agenda would ask five practical questions.

What are the minimum hydrological, groundwater, infrastructure and water-quality indicators that decision-makers need to monitor routinely?

Where are South Africa’s most consequential water blind spots: groundwater, wastewater, river health, municipal storage, non-revenue water, industrial demand, disaster losses or water quality?

How can seasonal forecasts, hydrological anomalies and infrastructure data be converted into operational triggers?

How should business interpret water risk without overreacting to single events or underreacting to slow-moving trends?

And what forms of data sharing are needed between researchers, utilities, municipalities, regulators and major water users?

These questions sit squarely in the space the Rand Water Hub should occupy. The Hub can help connect global evidence to South African operating realities. It can convene researchers and practitioners around specific water-system questions. It can translate technical assessments into decision frameworks. It can help business understand water as infrastructure, not only as an environmental issue. And it can support a more mature public conversation about what water security actually requires.

South Africa will still need pipes, pumps, treatment works, maintenance budgets, municipal reform and catchment protection. Better information will not replace any of these.

But without better water intelligence, we will keep misreading the system. We will mistake rainfall for resilience, dam levels for security, boreholes for insurance, and data gaps for uncertainty we can afford to ignore.

That is the lesson the WMO report offers South Africa. The future water system will not be managed well by institutions that only respond after failure. It will require institutions that can see, interpret and act early enough for knowledge to matter.