ABSTRACT
In this paper the relationships between renovation work in historic cities and their sewerage systems are considered. Particular attention is paid to the history of sewerage development in urban areas, the capacity of the sewerage network as compared with the sewage disposal demand stemming from the contemporary civilisation requirements, the condition of piping and the possibilities of bringing it up to current standards. Attention is also focused on conflicts between sewage piping and underground urban infrastructure development and on technical possibilities of adjusting the sewerage system to the latter. These problems are discussed using Polish and foreign experience in this field and results of investigations into the collectors in the city of Wroclaw. The condition of the collectors is described and the causes of their degradation are given.
