The territory of the Republic of Kalmykia is almost waterless. Small rivers and other open bodies of water dry up completely in the summer. The amount of precipitation in different regions of the republic ranges from 100 ml to 300-400 ml. in year. The purpose of the presented work was the task of the possibility of using wastewater in agriculture. In the republic, only private owners use wastewater for their own needs. There is no target program for the use of wastewater at this time in Kalmykia. Discharge of polluted wastewater in Kalmykia accounts for more than 80% of the total amount of wastewater entering the region. All sources of surface waters of the republic have increased mineralization and are chemically polluted. According to sanitary standards, most of the wastewater is referred to as industrial water. The material for writing the article was the developments carried out by students and staff of the faculty over the past few years, which were exhibited at international conferences. Most of the materials were obtained during expeditionary routes through the territory of the Republic of Kalmykia in recent years. The results obtained will make it possible to use them for additional water production, both in agriculture and for the drinking needs of the population.