Studies have shown that the flow dynamic of water in aquifer is very complex and it is difficult to observe or characterize directly the processes that occur in the porous media of the soil structure. As a result of this, carrying out studies on the characteristics of contaminants at the subsurface often relies on indirect measurements of the parameters of the system. However, the continuous use of tracers in simulation studies to model hydrological characteristics at the subsurface have provided an important tool for understanding the flow and mixing dynamics of water resource systems. Result obtain from this tracer test shows that multidimensional transport in an aquifer involves both longitudinal and transverse dispersion in addition to advection and can be achieved using a radial flow test. Transverse dispersion in an aquifer can spread dissolved contaminant faster than advection by molecular diffusion when flow velocity of groundwater is highly low. The initial concentration of dissolved contaminants at a source point can cause an upstream spreading by molecular dispersion in an aquifer. The use of tracer test can provide preliminary information for site characterization and groundwater monitoring to help in the design of environmental network to evaluate possible accidental migration of contaminants once it occurs in aquifers and plan suitable mitigation actions to safeguard our water resources.