How Trade Policy Can Change Where Water Flows
Published on March 19, 2026, this World Bank blog post explores the often-overlooked connection between trade policy and global water use. The hidden water embedded in the goods we consume is known as “virtual water.” Through trade, enormous volumes of it move across borders, international trade moves roughly 500 billion tons of water every year, equivalent to a quarter of total global water use. The authors argue that trade policy is not merely an economic instrument; it is also a powerful lever for shaping where and how water is consumed around the world.
Trade Helps Save Water — But Not Always
Water is unevenly distributed across the world. North America holds over half of global renewable freshwater but only 5% of the population, while many densely populated regions such as South Asia and the Middle East face severe water stress. Trade helps balance these differences. The World Bank’s flagship report Continental Drying: A Threat to Our Common Future finds that crop trade saves around 500 billion cubic meters of water annually, because many crops are grown where water is used more efficiently than in importing countries.
However, the picture is not uniformly positive. About one-fifth of the irrigation water embedded in traded goods comes from places where water is scarcer and used less efficiently than in the importing markets. In these cases, water-stressed countries effectively export scarce resources through agricultural products, a mismatch that reveals trade flows do not always align with sustainable water use.
Three Mechanisms: Prices, Regulations, and Cooperation
The authors identify three ways trade policy can influence water use. First, price signals matter: in many water-stressed regions, water is often underpriced, and energy subsidies can make groundwater pumping artificially cheap. Tariffs on water-saving technologies (such as drip irrigation systems, smart meters, and wastewater-treatment equipment) can slow their adoption. Reducing these tariffs could make water-efficient solutions more accessible.
Second, non-tariff measures also shape outcomes. Australia’s Water Efficiency Labelling and Standards scheme sets performance and labeling requirements for water-using products, which apply equally to domestic and imported goods. The EU’s Corporate Sustainability Due Diligence Directive requires firms to assess environmental risks (including water use) across supply chains.
Third, international cooperation offers additional tools. The EU–Chile Advanced Framework Agreement includes commitments to sustainable water use and creates mechanisms for joint monitoring and dialogue. The Japan–Australia Economic Partnership Agreement supports collaborative research on efficient irrigation and water management.
Aligning Trade with Water Sustainability
Reorienting trade toward more water-efficient outcomes will take time and effort. Virtual water trade is deeply embedded in global value chains, and sudden policy shifts can disrupt producers, traders, and consumers, particularly in developing countries. Therefore, gradual and transparent approaches (such as phased disclosure of water footprints and basin-level sustainability indicators) are recommended, paired with private-sector engagement and technical assistance.
Reference
Sikora, I., Zhang, F., Borja-Vega, C., & Luengas Sierra, P. (2026, March 19). How trade policy can change where water flows. World Bank Blogs – The Trade Post. https://blogs.worldbank.org/en/trade/how-trade-policy-can-change-where-water-flows