Risk estimation method of secondary water pollution in water supply system

The functional safety of the water supply system should be implemented by using risk standards, available reliability methods or with the use of Water Safety Plans, which are dedicated to all water supply companies. The constantly updated knowledge and the ability to carry out risk analysis and assessment based on the available tools, allows for effective decision-making process in order to minimize the health risk and the negative effects posed by the risk of secondary water pollution in the water supply network. The main aim of the article was to propose an original model for estimating the risk of secondary water pollution in the water supply system. The proposed model is based on a four-parameter risk matrix. The presented methodology containing a matrix proposal and criteria on a descriptive-point scale can be used in risk analysis and assessment both in qualitative and quantitative terms. Additionally, it will have a positive impact on the effectiveness of the water supply security management process in water supply companies. For the proposed model, a calculation example for a water supply network operated in south-eastern Poland has been presented.