Many of us have heard that we should eat locally grown food to reduce the energy needed to transport and preserve the food between the source and our table. Many of us have also heard that we should reduce our meat consumption to reduce the amount of land and other resources needed to support our diets and lifestyles. Another metric to consider is how much water is needed to produce different foods.
Based on values from the Water Footprint Network, I compiled a chart of how much water is needed to produce certain foods. This is obviously not an inclusive list of all foods, but gives an idea of the range of values for different kinds of foods. These values will also differ in different countries and regions. As noted by the director of the Water Footprint Network, Arjen Y. Hoekstra, “Water problems are often closely tied to the structure of the global economy. Many countries have significantly externalised their water footprint, importing water-intensive goods from elsewhere. This puts pressure on the water resources in the exporting regions, where too often mechanisms for wise water governance and conservation are lacking.”
In the table on the left, values are generally for liters per kilogram unless otherwise noted. In the table on the right, values are generally for gallons per pound unless otherwise noted.
You can calculate your own water footprint with this calculator for an estimate of which parts of your diet and lifestyle are most water intensive.