Why trade water risks are getting harder to ignore
In a 2025 United Nations University analysis of water inequity in global agricultural trade, researchers found that food trade reduces water scarcity for much of the world’s population but distributes the gains unevenly. The report said 75% of people in high-income countries and 62% in low-income countries see scarcity reduced through trade, yet 37% of people in low-income countries also face increased scarcity, compared with 22% in high-income countries.
That imbalance matches findings from a 2024 Nature Water study, which concluded that agricultural trade generally relieves water scarcity overall but disproportionately benefits richer groups. The paper said 35% of the population in developing countries suffering both increased scarcity and inequity are the poorest group, while relatively poor populations in developed countries often benefit.
UNU-INWEH director Kaveh Madani called the pattern “a broader pattern of environmental injustice” in a news release.
How trade water risks move through supply chains
Water rarely appears on invoices, but it sits inside the commodities that keep global commerce moving. A 2024 Nature Reviews Earth & Environment review found that roughly 20% of the water used in global food production is traded virtually rather than consumed domestically, with livestock products, wheat, maize, soybean, oil palm, coffee and cocoa accounting for more than 70% of total virtual water trade.
That helps explain why the issue is expanding beyond farms and into broader supply-chain planning. A 2025 Chatham House report on the water footprints of food and agriculture trade said virtual water trade in the sector roughly trebled between 1986 and 2022 and warned that harmful flows are not neatly divided between North and South, even if poorer exporters are often less able to absorb the damage.
Why trade water risks hit the Global South harder
The sharpest danger is not that trade exists, but that water-poor exporters often need the foreign exchange more than they can afford the depletion. In countries already under climate, debt and infrastructure pressure, the hidden export of water can leave less room for households, cities and smaller farmers when drought hits.
That broader backdrop is worsening. UNU-INWEH’s 2026 “Global Water Bankruptcy” report argued that more river basins and aquifers are losing the ability to return to historical norms, turning what used to look like periodic stress into a chronic condition. Once that happens, trade no longer just reallocates water use; it can lock fragile producers into exporting from depleted systems.
Older warnings about trade water risks
None of this arrived without warning. A 2023 JSTOR Daily explainer on the virtual water trade described the system as an uneven exchange between water-rich and water-dependent economies. Much earlier, a 2015 Dialogue Earth report on India and China showed how export-led food policy could drain one country’s water base while another conserved its own supplies by importing thirstier crops.
The policy challenge is not to unwind trade, which can still protect food security and reduce local pressure in genuinely water-scarce importers. It is to make water costs visible, reward less water-intensive production, push buyers to account for basin-level stress, and stop treating depleted aquifers in poorer exporting regions as somebody else’s problem. If that does not happen, trade water risks will keep rising even when supermarket shelves stay full.
