This study deals with the carcinogenic and non-carcinogenic health risks for adults and children from the exposure of contaminated alluvial soil by heavy metal, chromium salts (K2Cr2O7), and remediated soil by planting Chrysopogon zizanioides (vetiver grass) on the contaminated soil. The experimental setup had been prepared with a total of 05 galvanized iron sheet boxes of size 45cmx45cmx90cm, in which contaminated low compressible silty soil was kept and vetiver grass was planted on it. After 150 days of field experiment, the vetiver grass with its roots was harvested. The atomic absorption spectroscopy tests were carried out to evaluate the metal concentration in contaminated and vetiver-remediated soil. The heavy metal concentration found in contaminated and remediated soil was used to analyze health risks for children and adults for three exposure pathways. Carcinogenic and non-carcinogenic health risk assessments were performed as per guidelines of the United States Environmental Protection Agency. The hazard index (HI) and hazard quotient for exposure pathways were calculated. It has been found that HI values of Cr(VI) for adults were found below the permissible limit but for children below six years it was found to be from 1.25 to 3.15, showing potential risk to children. After carrying out phytoremediation work, the HI values were calculated and found to be less than one, showing no potential risk for children. The total life time cancer risk has been found from 1.04 to 4.67 × 10–4 for adults and 6.32 to 28.31 × 10–4 for children due to Cr-contaminated soil. After remediating soil by using vetiver grass, it was reduced from previous to 0.48 to 0.64 × 10–4 for adults and 2.97 to 3.91 × 10–4 for children, which shows the reduction of potential risk. From this study, it has been concluded that the vetiver grass has high potential to minimize the risk to human health from sites contaminated by Cr(VI).