Groundwater is a renewable resource wholly or partially protected from external influences (pollutants) by nature. Currently, about 75% of the population of the Republic of Serbia meets its water needs by using underground water. Hence, this water represents an essential strategic resource of our country; according to data from the Water Management Foundation of the Republic of Serbia (VOS, 2001), water from existing sources is used in quantities of about 23m3/s. As 67.13m3/s is the estimated potential of underground water in Serbia, we state that only 1/3 of the total available potential of these waters is in usage. Therefore, we can count on these exceptional quality underground waters in emergencies. The problem is the need to monitor these waters that need to be captured and have their intended use. Monitoring water's quantitative and qualitative parameters is necessary to determine which reserves we are talking about. Whether it is easy to reach these resources (road and electrical infrastructure), making accompanying maps using GIS tools is essential. The paper will give an example of identifying hydrogeological objects in an area, establishing monitoring of selected hydrogeological objects, and determining which maps need to be made that would be important in emergencies.