ABSTRACT: In paper there are presented two new methods for more accurate solution of protection and protection zones of the groundwater sources in rock environment with karst-joint and joint permeabilities proposed by author. The first method is aimed on computational determination of an areal extent of infiltration area of the evaluated ground water source and with it connected wider protection zone. The second one is oriented on evaluation of vulnerability of the groundwater source to pollution in infiltration area in dependence on character and degree of open failure of rock environment and subsequent different dilution, absorption and elimination processes during the groundwaters crossing through rock environment from infiltration area to their ascent in water source.