Testing the health and safety of drinking water in the area of Gorski Kotar over many years has yielded poor results. This is the reason why there was survey conducted in this area in order to obtain information regarding the education, interest and thoughts about the quality of drinking water. Furthermore, the paper analyzes the results for the region, monitoring the safety of water for human consumption in the water supply network of Gorski Kotar in the five-year period (2011 - 2015). Given the significant changes related to the water supply that have occurred during this period (regulations, sanitary and technical requirements - installing a large number of automatic chlorinator), the trend of parameters for drinking water was observed and analyzed. In the last 2-3 years in the area of Gorski Kotar, the state distribution network that monitors the water had significantly reduced the amount of water samples that were required to obtain results. Furthermore, the number of unsafe drinking water samples were reduced as a result of installing the new automatic chlorinators. In order to further improve the water supply in Gorski Kotar, it is necessary to invest further efforts into the protection of water supply areas, to maintain sanitary and technical conditions of the whole system, conduct regular and continuous disinfection of drinking water via the automatic chlorinators in conjunction with expansion of the sewage network system.