Safety Analysis of Tap Water Biostability

The work concerns the analysis and assessment of the risk of biological stability of water. The consequence of the lack of water stability is an increased susceptibility of the distribution system to secondary microbial contamination of water and thus a threat to the health of consumers. The value of risk function is a measure of the loss of safety of water supply. The health of water consumers is a priority. From the point of view of the required quality of water intended for human consumption, the value of the risk function is related to failure to meet certain water quality parameters that may adversely affect physico-chemical parameters and the bacteriological quality of the water reaching the consumers. The paper presents the method of analysing and evaluating the risk of loss of biostability of tap water. The analysis was based on the operating data obtained from the water treatment plant.