ABSTRACT

Safety is inherently connected with the responsibility during the decision-making by the operator of the Collective Water Supply System (CWSS) (Jaźwiński 2000, Lewandowski 2000, Rak 2011, Rak 2013, Tchórzewska-Cieślak 2009, Tchórzewska-Cieślak 2010). Therefore, in order to avoid the negative consequences of making wrong decisions concerning the operation of the network we must learn how to judge the risk of undesirable events and inform others of its size, as well as gain the knowledge necessary to conduct proper activity when the risk occurs.