Abstract
The results of chemical analysis of natural waters from surface (river, water supply) and underground (well, well) sources are given. Water selection for analysis was carried out in a number of cities and villages of the Samara and Penza regions. The analysis was performed on the following indicators: total stiff ness, hydrogen index, calcium, magnesium, iron cations, chlorides, sulfates, hydrocarbonates, permanganate oxidability. The most common chemical indicator of water quality exceeding MPC was identifi ed. The negative impact of rigid water on the operation of boiler units and household needs is shown. Various methods of water softening are illuminated. The results of determination of water hardness before softening and after fi ltration through a layer of cationite and anionite are presented. Based on the obtained indicators, recommendations are given on the selection of softening methods for various types of boilers.
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