The assessment of the human risk of mutagens is a constituent of the general assessment of the risk of environment-pollutant chemicals to the population's health. An algorithm of assessing the risk of mutagens is proposed. Stage 1 (hazard identification) is to provide an expert analytical characterization of the mutagenic potential of the chemicals polluting the study object. Stage 2 (hazard characterization) is to analyze the quantitative dependences of the effect of mutagens in gametes and somatic cells of man and mammals. Stage 3 (effect evaluation) is to characterize the sources of pollution and the doses of mutagens affecting the population. Stage 4 (risk characterization) is to calculate the risk of mutagens to the population and individuals.