The aim of this research paper is to evaluate the degree of the transportation of E-Coli bacteria through different types of soil namely gravel soil, sandy soil and clayey soil. In Sri Lanka, common practice of on- site wastewater disposal system is soakage pit. Therefor the transport of pathogenic organisms from soakage pit to the environment through different type of soil is studied in this research. Furthermore, this study also concentrated the behaviour of the other wastewater contaminants such as BOD5, Solids concentration and the turbidity. The soil column was designed by using different type of soil. Waste water from the effluent of a wastewater treatment plant was poured into the soil column and tests were carried out at influent and effluent of the soil column. The soil column was prepared with the different type of soil around soakage pits. The influent wastewater was not contaminated with E-Coli bacteria. However, the presence of E-Coli bacteria in the effluent confirms the presence of E-Coli bacteria in the soil column which was prepared with the soil around soakage pits. However, the amount of E-Coli found in the effluent sample varies with the type of soil. (i.e. E-Coli in clayey soil ˂ E-Coli in sandy soil ˂ E-Coli in gravel soil). Furthermore, the BOD5 was found to be less in effluent than in the influent. However, the total solids concentration and the turbidity was more in the effluent than the influent. The result of the study shows that the pathogens get transported from soakage pits to the environment and degree of movement of the waste contaminants vary with the type of the soil around the soakage pit.