Geothermal waters can be extracted from one or two boreholes. The extraction from one borehole is possible only in case of unmineralized waters as pure as drinking water. Basing on chosen underground water intakes already existing in Kalisz, and the boreholes in Uniejów and Konin from which thermal water is obtained, the predicted parameters of thermal water in Kalisz at the depth of 2000m are 65 to 75ºC (max 80ºC), while the average tempereture on the surface is 60 to 65º. Until a bore is done and the temperature and physicochemical composition of the waters established, it is premature to predict the way the waters might be used as an independent source of heat or a source associated with other energy carriers such as , for example, conventional energy.