The over allocation challenges the demand and supply of its water consequently challenging the resources at its basin Due to the imbalance in the demand and supply the water security at the basin of the river is highly dependent on groundwater reserves During droughts the quantity of groundwater reduces rapidly with the effects being felt much in the seven states in the basin of the river Drought as a natural calamity is not preventable Therefore there is need to have control measures to be able to survive the drought with sufficient resources which is possible through proper analysis of the case and proposal of best ways to cope with the situation This paper studies the security status of the groundwater in previous droughts and the threats to the states whose allocation relies on the water The paper therefore evaluates the case and the related threat to the water security with a goal of arriving at accurate and valid inferences that can get used when getting solutions to the problem and maintaining a high supply of the resource that will sufficiently meet the demand The paper uses the data by for Space Research Center University of Texas which contained the report of their analysis of the average changes of the water levels of the river in times of droughts up to 2013 Scanlon Zhang and Reedy 9900 The study area spans across the basins of the river including states such as Mexico Arizona and Colorado The upper basin of the river runs along the upriver of Lake Powell while the lower runs the lake s downriver