Emergency events in water supply system in Poland

Emergency events in Polish Water Supply System (WSS) were presented. Three kinds of emergency events were distinguished on account of main premises which caused them: technical (T), human (H) and environmental (E). Also emergency events ensuing as a result of cooperating of the factors mentioned above were distinguished. A model of the probability of the appearance of emergency events in Water Supply System as a result of occurring and cooperating of the three factors: technical (T), human (H) and environmental (E) was displayed.