Аннотация:There are the investment discusses in the reconstruction of the ice palace water treatment system which has located in the Moscow region. Authors note some features of design solutions for the water treatment process in this particular region. Researchers consider the requirements for water quality before using the reserve osmosis unit in this article. It has been highlighted the features of the technological process in the ice palace—pouring ice. Authors have noted the strong requirements for ice rink water quality than water which has been used in water supply of drinking purpose. There are the laboratory tests results of water source quality which have been used in technological process in the ice palace. The possible sources which increase the content of various water indicators in the water source of building have been identified by authors of this paper. These sources can have the natural or artificial origin. Researchers have shown them in this report. Authors present the analysis of main investments to design solutions for the ice rink water treatment system. It has been considered the potential operating cost for the ice rink technological process by authors of this paper. There are some possibilities of reducing the operating cost for ice rink water treatment system.