India has achieved remarkable success in foodgrains production in the last four decades and it has been largely banking on tubewell irrigation. This paper demonstrates theoretically and with the help of econometric results that excess depletion of ground water makes agricultural growth unsustainable in the long-run. Although there is still ground water potential in certain parts of the country and limited scope is also available for utilising surface water, the next frontier of technologies and agricultural research can play the most significant role in this perspective.