Krakow's water supply and sewerage systems, due to over 100 years of service life and negligence in past decades, has recently been undergoing extensive rehabilitation works, mainly using the trenchless methods. The paper will give an overview of the trenchless methods applied, with particular focus on, among others, Phoenix, cementation, compact pipe, relining GRP panels, basalt lining and others. It will also be studied how the water supply system rehabilitation program completed contributes to the elimination of secondary water pollution and the improvement of water supply security levels, and the effects of sewer system renovation on the improvement of sewage disposal efficiency and environmental safety will be analysed.

dr Tadeusz Bochnia, Municipal Water and Sewage Company S.A. in Kraków (MPWiK S.A)
Graduated from the Faculty of Chemistry at the Jagiellonian University in Kraków. A Former member of the research staff at the Jagiellonian University; having moved to the Kraków Municipal Water and Sewage Company (MPWiK SA Kraków), in his capacity as the Head of the Central Laboratory, supervised the quality and health safety of water for the Kraków agglomeration of nearly a million population. Currently Dr Bochnia is the company’s Deputy Technical Director, still continuing research activity through participation in research projects. He is the author or co-author of about 70 publications on water and sewage management, ecotoxicology, safety and reliability of water supply systems. Since 2008, Secretary of the Supervisory Board of MPWiK S.A. in Kraków. A member of the Upper Vistula Basin Water Management Board (Silesia, MaÅ‚opolska, Podkarpacie).