From the “hunger stones” re-emerging in European rivers to global data on the crisis, the world is consuming more water than it is able to replenish. Yet through sustainable management, treatment and desalination, there is still an opportunity to reverse the trend.

“We are using more water than the world can replenish.” It is a technical, almost clinical phrase, used in international reports to describe the state of global water resources. But its meaning becomes clearer when placed alongside a much older inscription: “Wenn du mich siehst, dann weine”, “If you see me, then weep”. These words are carved into a Hungerstein, or “hunger stone”, dating back to the 15th century and re-emerged in 2022 from the riverbed of the Elbe. When these stones became visible, it meant water levels had fallen so low that famine was imminent. They were not symbols, but warnings. Today, however, the difference is that this signal no longer refers to isolated episodes, but to broader and interconnected dynamics.

A water balance under pressure

According to the study Global Water Bankruptcy – Living Beyond our Hydrological Means in the Post-Crisis Era, the world has entered a phase of growing imbalance between water availability and consumption. This is not a mere metaphor. As in economics, it means we are using a resource faster than it can be replenished. For decades, the focus was on water stress, scarcity and local emergencies. Today, the language is changing because the scale of the problem is changing. It is no longer about temporary imbalances, but about a structural pressure between supply and demand that is becoming increasingly evident. In other words, maintaining balance now requires increasingly targeted and continuous action.

The Numbers behind the Water Crisis

The data clearly illustrate the scale of this imbalance. More than two billion people still lack safe access to drinking water, while around three-quarters of the world’s population experiences water insecurity for at least part of the year. At the same time, a large share of groundwater resources is being exploited beyond their natural recharge capacity. This means we are not only using the water that is “naturally replenished”, but also drawing on reserves accumulated over extremely long periods, often thousands of years.

The causes are well known and deeply interconnected. Intensive agriculture accounts for the largest share of global water consumption, often relying on inefficient systems. Urbanisation continues to grow, increasing overall demand. Pollution reduces the amount of water that is actually usable. On top of this, climate change is altering precipitation patterns, making periods of drought more frequent and longer lasting. The result is visible in the world’s major water basins, many of which are coming under increasing stress. In some regions, this pressure is already severe, and here the water crisis intersects with other challenges: food security, economic stability and social cohesion.

A Long-term Shift

Another key finding emerging from recent analyses is the concept of irreversibility. Not all water resources can be recovered within meaningful timeframes. Some aquifers, once depleted or contaminated, take centuries to return to their original levels, and full recovery is not always guaranteed.

This fundamentally changes the perspective. We are no longer dealing only with cyclical phenomena, but also with long-term transformations of natural systems. The warning signs are becoming increasingly clear: rivers are drying up, lakes are shrinking, and infrastructure is being placed under growing pressure. And, as in the summer of 2022, even the “hunger stones” re-emerging from European riverbeds, reminding us that these limits are not new, but are now becoming more visible and more immediate.

Changing Course

Yet even within this scenario, there remains room for action. Water management becomes the real turning point. It is not simply about reducing consumption, but about rethinking the entire water cycle, from abstraction to reuse. Wastewater treatment, for example, makes it possible to turn waste into a resource, returning water to agricultural and industrial systems. At the same time, desalination technologies offer a concrete solution, particularly in coastal areas, by making seawater, a vast but previously underutilised resource, available for use.

In this context, Fisia Italimpianti illustrates how industrial innovation can help change course. Through the development of advanced desalination and water treatment plants, it is possible to significantly increase water availability in critical areas, while improving process efficiency and reducing environmental impact.

The solutions already exist, but they require profound changes: reducing waste, rethinking agricultural systems, protecting ecosystems and investing in more efficient infrastructure. Above all, they require a shift in perspective, one that sees water not as an unlimited resource.