Heavy metals are contaminants with the ability to accumulate in soil. Certain contaminants are also bioavailable and depend on many characteristics of the soil and of the zones. Study on heavy metals concentration in irrigated soil was conducted in Gombe State, Nigeria with the aim of evaluating the concentration of heavy metal in irrigated soil in the three zones that makes up the state namely; Northern zone, Central zone and Southern zone. From each zone, four locations were selected including one control. Soil samples were taken randomly from the selected areas of the study and replicated thrice. The collected sample were transported in airtight polythene bags to the laboratory for analyses using Atomic adsorption spectrophotometer. The result from this study revealed significant differences in soil heavy metals Concentration in the three zones. A factor attributed to partly to the to pogenetic variability and anthropogenic activities. Results obtained revealed moderately variable concentrations with coefficient of variation of Zn (32.14%), Cu (25.93%), Fe (34.09) and Pb (36.32%). Low variability was recorded on Cd (14.16%), Cr (10.86%), Ni (7.16%) and As (18.98%). However, all the metals were below the permissible limit of heavy metal in soil according to WWF standards. Regular monitoring of heavy metal in Fadama Soil was recommended asessential to prevent future excessive build up. The study served as baseline information for further research.
