This paper discusses materials of studying the morphological properties of alluvial soils in the floodplain ecosystems of Western Siberia. It reveals the peculiarities and main regularities of their changes in different pollution zones (the Contamination source being an impact zone). The state of the morphological peculiarities of technogenically polluted soils is compared with background analogs. The article describes the technogenic signs in the upper horizons of chemical-contaminated soils at different levels of oil hydrocarbon (OHC) pollution. There have been identified correlations between the content of total oil hydrocarbons (OHC) in horizon АY v, x and its color parameters measured in the Munsell system.