One of the biggest environmental problems in the world in the XXI century is the problem of water. The decrease in water reserves increases the need for water purification in the mining, chemical, petrochemical, textile and food industries. A million cubic meters of water from such large industrial zones are used. The concentration of anions and cations in the water used increases by 3-4 times. Today, wastewater discharge from mining and chemical industrial zones in the Navoi region affects freshwater resources in nearby areas. To prevent this, methods of precipitation of anions and cations should be studied. At the industrial level, an important step is the implementation of measures for the reuse of purified water.