The results of the research on influence of granulation of solidified wastes on washing-out level of harmful substances were presented. Solidified waste was crushed into fractions: fraction < 10 mm, seven fractions with thr grain-size distribution from 0.125 mm to > 16 mm, and the largest fraction was the 10 mm cube, The research was taken after 28 days and 90 days after the waste solidification. It has been stated that the content of harmful substances in aqueous extracts from these fractions increased while the grain-size decreased. The, longer time of solidification. the lower was the content of examined substances in aqueous extracts. Standarized procedures or guiding rules for aqueous extracts preparation from solidified wastes can be based on those results.