In this study, the mathematical modeling of contaminant movements in the porous medium was evaluated in order to determine the potential ground water pollution in Eskisehir region. Analytical solutions of mathematical modeling were done to show the distributions of contaminant concentrations by graphically. Multi-flow computer programming was used to determine the distribution of contaminant concentrations with respect to time and length. The distributions of contaminant concentrations from the contaminant source were determined with respect to time, length, thickness of aquifer, the velocity of ground water and dispersivity. The distribution length of contaminants such as nitrate, nitrite, ammonium, methyl-alkalinity and phenol were determined using the mathematical model modeling. Contaminant sourer was also considered as a continuos point source in the mathematical model.