With the era of industrialization and excessive dependence on chemicals, there is increased indiscriminate disposal of especially chlorinated solvents causing a variety of environmental problems. Chlorinated solvents including trichloroethylene (TCE) and perchloroethylene are significant groundwater contaminants causing severe health effects. Various technical strategies have been developed and applied, often with limited success. Time frames for remediation tend to be long, usually measured in decades. In this review we focus on remediation of chlorinated solvents in groundwater by the addition of exogenous microorganisms, specifically members of the genus Dehalococcoides (DHC) referred to as bioaugmentation. Many potential technologies for remediation of chlorinated solvents, its past, present and future as well as how bioaugmentation is superior to these techniques are discussed.