The contamination of groundwater by heavy metal, originating either from natural soil sources or from
anthropogenic sources is a matter of utmost concern to the public health. Remediation of contaminated
groundwater is of highest priority since billions of people all over the world use it for drinking purpose.
In this paper, thirty five approaches for groundwater treatment have been reviewed and classified under
three large categories viz chemical, biochemical/biological/biosorption and physico-chemical treatment
processes. Comparison tables have been provided at the end of each process for a better understanding of
each category.