Anthropogenic pollution of environment leads to emergence of immune system malfunction among children. Using the method of flowing cytofluometry and immune-ferment analysis, we have studied alterations in indexes of immune system among children who consume water with increased contents of strontium. It has been established that expression of early (CD25 +) and late (CD95 +) activation antigens on immune cells has been decreased, and expression of anti-inflammatory cytokine IL17 has been increased in statistically-significant values (р < 0,05) among the studied children. Intake of chemical polluting substances (strontium) defines development of immune disturbances that can cause heavy pathological processes in an organism.