The world has entered what United Nations scientists are formally calling an era of global water bankruptcy. In this post-crisis condition, many water systems can no longer recover to historical baselines.
Released by the United Nations University Institute for Water, Environment and Health, the report argues that familiar concepts such as water stress or water crisis no longer reflect reality in many regions. Instead, decades of over-extraction, pollution and ecosystem degradation have permanently undermined rivers, aquifers, lakes and wetlands that once buffered societies against drought and climate extremes.
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From water stress to water insolvency
The report defines water bankruptcy as persistent over-withdrawal from surface and groundwater beyond renewable inflows and safe depletion limits, combined with irreversible or prohibitively costly loss of water-related natural capital.
Lead author Kaveh Madani, Director of UNU-INWEH, said many societies are no longer drawing down annual water income but have exhausted long-term savings stored in aquifers, glaciers and wetlands.
“Many critical water systems are already bankrupt,” Madani said, warning that the world is now living beyond its hydrological means.
Unlike short-term crises, water bankruptcy describes a condition in which recovery is no longer possible,e even in wet years, because the underlying natural systems that produce water have been degraded beyond repair.
Evidence of a system in decline
Drawing on global datasets, the report paints a stark picture of cumulative loss. More than half of the world’s large lakes have lost water since the early 1990s, affecting around a quarter of the global population that depends on them. Around 70 per cent of major aquifers show long-term declines, while land subsidence linked to groundwater depletion now affects nearly two billion people.
Natural wetlands covering an area almost the size of the European Union have disappeared over the past five decades, erasing ecosystem services valued at more than US$5 trillion annually. In parallel, more than 30 per cent of global glacier mass has been lost in several regions since 1970, with some mountain ranges expected to lose functional glaciers entirely within decades.
Human-driven drought and food risk
The report highlights the rise of anthropogenic drought, in which water scarcity is driven less by rainfall variability and more by over-allocation, land degradation, deforestation, and pollution, all amplified by climate change.
Agriculture sits at the centre of this risk. Around 70 per cent of global freshwater withdrawals are used for irrigation, with more than 40 per cent drawn from aquifers that are steadily being drained. More than 170 million hectares of irrigated cropland are already under high or very high water stress, while more than half of global food production occurs in regions where total water storage is declining or unstable.
Madani warned that without rapid transitions toward water-smart agriculture, water bankruptcy will spread further across food systems, trade networks and geopolitical relationships.
A justice and security challenge
UN Under-Secretary-General Tshilidzi Marwala described water bankruptcy as a growing driver of fragility, displacement and conflict, with impacts falling disproportionately on smallholder farmers, Indigenous Peoples, low-income urban residents, women and youth.
The report stresses that while the benefits of overuse have often accrued to powerful actors, the costs of irreversible loss are being borne by those with the least capacity to adapt, turning water governance into a defining equity and security issue.
Resetting the global water agenda
The authors argue that the current global water agenda, focused largely on drinking water, sanitation and incremental efficiency gains, is no longer fit for purpose in a world that has crossed multiple planetary boundaries.
Instead, they call for a shift from crisis management to bankruptcy management, prioritising prevention of further irreversible damage, rebalancing water rights within degraded limits, transforming water-intensive sectors and supporting just transitions for affected communities.
Upcoming milestones, including the 2026 and 2028 UN Water Conferences and the conclusion of the Water Action Decade in 2028, are identified as critical opportunities to formally recognise global water bankruptcy and reset international water governance around new hydrological realities.