In the Southeast we have our competition for groundwater for irrigation and other needs, which has now become part of the Water War between Florida, Georgia and Alabama. But competition for groundwater is occurring in many other parts of the US as well. This long story from the Arizona Republic describes the competition for irrigation water in Arizona and how it is affecting farms and farmers there. The depletion of ground water may make farming not feasible there in the not too distant future, and many smaller farmers are already having their wells run dry as water tables drop. You can read the article here.