The data was collected during laboratory experiments in a 2-D porous media, in a 0.9 m x 0.3 m x 0.12 m box. Sand hydraulic conductivity was 2.3E-3 m/s. A salt core was placed along the bottom third of the tank. A constant head boundary was applied at the top left and top right corners of the tank. Gradients of 2%, 5% and 10% were used. Salt concentrations were collected using resistance measurements which were calibrated against standards.