The effect of degradation caused by ion leachate migration in the soil of Gosa dumpsite was investigated with reference to water and soil from dumpsite located at Idu Industrial area- Abuja. This was done to determine the health and environmental pollution status caused by heavy metals concentration present in the dumpsite and its effect to inhabitants within the settlement. Soil samples collected during dry and wet season were pretreated and digested using hotplate. The heavy metal concentrations were determined using Atomic Absorption Spectrophotometer. The samples were analyzed for concentration of lead (Pb), cupper (Cu), manganese (Mn), nickel (Ni) and chromium (Cr). Control soil samples were taken 300m away from the dumpsite. The dumpsite was divided into four cardinal points including the centre from which samples were collected for analysis. Water samples were collected from three wells to test for physiochemical properties of PH, chemical oxygen demand (COD), biochemical oxygen demand (BOD), dissolved oxygen (DO), Hardness, Conductivity and Alkalinity. The result showed significant difference in concentration of these metals in the dumpsite and control. The dumpsite was found to contain significant amount of toxic heavy metals. The analytical results indicates that in both dry and wet season, most of the metals concentration were above the World Health Organization (WHO) and Standard Organization of Nigeria (SON) standards, which is a major concern as these metals pose threats to human life, agricultural productivity and unsafe for the inhabitants.