Аннотация
Local monitoring of Kundruchya and Bolshaya Gnilusha rivers's water toxicity was conducted by a biotest battery in 2010-2018.The response of the test-objects was different.The final degree of toxicity was higher in the Kundryuchya river.Toxicity in both rivers persisted throughout the years, except for 2015.It is necessary to use a biotest battery.