Water footprint (WF) has been introduced as a method to indicator of water use that looks at both direct and indirect water use of a consumer or producer. Direct water use refers to the water use by the consumer or producer himself. Indirect water use refers to the water use in the production chain of products bought by the consumer or producer. WF divides the water use into three components, i.e., green, blue and grey water which are specified geographically and temporally. The green water footprint refers to the volume of rainwater consumed during the production process of a product. This is particularly important for agricultural and forestry products, where it refers to the total rainwater evapotranspiration plus the water incorporated into the harvested crops and wood. Blue water footprint refers to the volume of surface and groundwater consumed (evaporated and incorporated) into the production of a product. Grey water footprint refers to the volume of freshwater required to assimilate the load of pollutants based on existing ambient water quality to comply with the defined water quality standards. The concept of green and blue WF assessment has been widely applied in many studies concerning water use, especially for food and agricultural products. WF analysis has led to a better understanding of the virtual water requirement of agricultural products which can in turn be used to evaluate the implication of agricultural trade. In addition, green/blue and direct/indirect WF distinctions can help the identification of “hotspots” linking the water use and the source of water.