This paper outlines the ecologo-biochemical principle and experience of its implementation in the study of soils of urbanized territories in conditions of the Koibalskaya steppe of Krasnoyarsk krai. The degree of biochemical activity of soils and the alkaline/acid situation that refer to the integral indictors are used as the information criteria for the present state of urban soils. T. V. Aristovskaya’s ‒ M. V. Chugunova’s proximate method was the basic technique of carrying out routine laboratory analyses of soil biochemical activity characterizing a large territory. It was found that the degree of activity of the soils studied in the industrial city of Sayanogorsk varies from low to very high. Soils with high activity are dominant in the area, as also do the optimal soils for this condition in the form of а weakly alkaline reaction of medium. In other words, experimental results were used to make a quantitative-qualitative assessment of the functioning of soils in conditions of urbanization and technogenesis. On the basis of data obtained and point-to-point measurements in the geoinformation environment, the IDW Nearest Neighbors method was employed in constructing the isolines maps, which is the geographical aspect of research into problem territories. In view of the specific character of the urban industry, proper attention was paid to the content levels of some heavy metals of hazard class I and II in the soil having regard to stringent tentative allowable concentrations (TAC) as the background where complex soil-biochemical processes are taking place. The study revealed a relatively high level of soil pollution by heavy metals. Pollution of the urban soil cover by these chemical elements shows a highly random pattern, in agreement with its heterogeneity and variation in alkaline/acid conditions.