Geo-Studio program is used in this study with its sub-programs named SEEP/W and CTRAN/W 2012 to represent and analyse the phreatic line, the amount of seepage through the dam, the pressure head, the discharge, the total head and the amount of contaminants that transport through the body of the dam. The problem of transportation of contaminants through homogeneous earth dam due to seepage flow was studied and simulated using the computational fluid dynamic technique with the help of Geo–slope programs. The paper also studied the prediction of future contaminants’ levels in the specified dam. The study also discusses the effect of pool water level fluctuation from maximum to a minimum level on the seepage flow and the time of pollution transmission. From the Geo-studio software, it is deduced that when the water level is at the maximum height (20m), it needs 12 days, at normal height (15m) it needs 30 days, while at a minimum height (8 m) it needs 100 days to reach the drain zone.