In 2017 our company carried out a geophysical survey in Leksadrowa, Malopolska Voivodeship. Our team had a task to determine the location of a new well for groundwater exploitation for Nowy Wisnicz municipality. An Electrical Resistivity Tomography method (ERT) was used to prosecute this survey. ERT tomography allows us to measure and provide interpretation in the 2D geometry. This method is used to diagnose geological structures and geo-engineering issues.