Efficient use of water resources is one of the main goals of the National Cropping Pattern Plan. For this reason, estimating the economic value of water for the crops listed in the plan is important for improving water pricing policies in agriculture. In this study, field data were collected through interviews with 100 farmers in the region, using stratified sampling, during the 2023–2024 farming year. The economic value of water was calculated for wheat, canola, barley, watermelon, and potatoes using parametric methods and production functions, including linear, translog, and transcendental functions. Based on econometric tests and classical assumptions, the translog production function was identified as the most suitable. The results showed that the economic value of water for each crop was 26,799, 44,525, 21,926, 39,461, and 40,756 rials, respectively. These values are significantly higher than the current water fees paid by farmers in Dehloran. The findings highlight the need to reform agricultural water pricing policies. This includes gradually increasing the water fees paid by farmers so that the price of water comes closer to its true economic value, thereby strengthening the cropping pattern plan and promoting more efficient use of water in agriculture.