The results of researches of impurity of 5 rivers, such as the Terek, the Sunzha, the Belka, the Dzhalka, the Marten from 2014 for 2015 were given for the territories of 12 settlements. The level of im-purity was determined by the content of 11 toxic agents. Also the rigidity, water transparency, the content of oxygen, the dry remnant and other indi-cators were defined. The data characterizing physi-cal parameters and the level of impurity of the riv-ers toxic agents were obtained. The greatest ap-proach of the polluting substances to maximum permissible concentration in the Terek and the Sunzha rivers was observed in nitrates in 2014. In the Terek the content of nitrates made 0.56 maxi-mum concentration limits, and in the Sunzha it made 0.62 maximum concentration limits. In 2015 the content of nitrates decreased almost twice both in the Terek and in the Sunzha. The concentration of sulfates in water tests of the studied rivers in-creased from 2014 to 2015 and made nearly a half from permissible maximum. The research of impuri-ty level of the rivers on the contents of ammonium ions showed that the greatest approach to maxi-mum concentration limit was in the river Belka. The maintenance of such pollutants as nitrites, iron, lead and cadmium, was observed in insignificant quantities, did not exceed maximum permissible concentration and on two orders was lower than maximum concentration limit in all rivers. The con-tent of mercury in waters of the rivers was insignifi-cantly small, generally below sensitivity of analytical definition. The content of oil products in the studied rivers also did not exceed maximum concentration limit and varied within 0.01-0.11 from maximum permissible concentration the content of the dis-solved oxygen in tests of water of the studied rivers conformed to hygienic requirements. The greatest approach to maximum concentration limit in the riv-ers was observed on the following indicators: tur-bidity, transparency and rigidity. The hardness of water of the Sunzha exceeded maximum permissi-ble concentration by 1.10 times. The proximity of a hydrogen indicator of pH to unit in all studied rivers, on the contrary, testifies about high quality of water. The water tests of the studied rivers had neither any smell, nor any taste. The characteristic of the studied rivers was the existence of a sandy deposit.