Water is a basic human necessity and as such a part of humanity’s life from the very beginning. From the early and simple tools to high technology for water acquisition, treatment and distribution we have today, providing drinking water has remained a challenging task. In this thesis, water supply systems state in the past and present are compared and trends of possible future development are indicated. A focus is given on various ways of data transfer between dependent objects of water system and their advantages and drawbacks are evaluated. Thesis introduces control and measuring equipment and concludes with guidelines for communications development in water supply systems.