The relevance of the research. In the coal mining industry of the Donbass region, there is a need to use large quantities of personal rescue equipment, which contain regenerative products. At present time, the necessary procedure for this waste disposal is not provided in this region. Thus, naturally, there is an unorganized accumulation of a product containing potassium superoxide that is dangerous for humans and the environment. The above mentioned product is also valuable and expensive. The second acute environmental problem of the region is the formation of a large amount of mine water at coal mining enterprises and their subsequent discharge into surface water bodies. One of the stages of mine water purification for its subsequent use in economic cycles is softening (reduction of total hardness). For these purposes, substances similar to the waste of regenerative products of self-rescuers, for example, lime and sodium carbonate in settlers and clarifiers are commonly used. Such a reuse scheme would be a profitable and modern approach to the environmental of the region. The main aim of the research is to study the possibility of re-using the waste of a regenerative product of unsuitable self-rescuers for their further use in the household needs of enterprises. Object: waste from chemically bound oxygen self-rescuers based on potassium superoxide, mine waters of the Donbass region. Methods: experimental research on the softening of mine water by waste of mine self-rescuers regenerative product on chemically bound oxygen by the reagent method. Results. It has been experimentally determined that the treatment of mine water with waste of the regenerative product of mine self-rescuers provides a high degree of mine water softening. Mine waters of Donbass region treated with a regenerative product meet the requirements for use in household purposes and have the following quality indicators: specific conductivity – 2891 μS/cm; pH=8,66; hardness=6,3 mg-eq/dm³; CO₃^–2=0; HCO₃=6,5 mEq/dm³, with a reagent dose of 4 mg-eq/dm³.