In this research, the Shefa-rud river sediments have been chemically analyzed to determine elemental matrix, heavy metals concentrations and pollution intensity. Though comparison of geochemical results with the world’s standards have been a common practice since 1971 but the research results show that use of mean of the metals concentrations of the earth's crust and world sediments are not suitable means to estimate the pollution load in the study area. Heavy metals concentrations of Shefa-rud river bed sediments are under control by the geology of study area and as a matter of fact, limestone units have a greater significant role than the other units. As limestone contain lesser concentrations of heavy metals, it is evident that the obtained concentrations are much lower than various world average sediment metal concentration.
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