Concentrations of dichlorodiphenyltrichloroethane (DDT) and hexachlorocyclohexane (HCH) were determined in 313 human omental fat samples collected from subjects from all five zones of India during 1977-1980. The median concentration of 2,2-bis-(p-chlorophenyl)-1,1-dichloroethylene (p,p'-DDE), total DDT, beta HCH, and total HCH were 3.4, 6.0, 1.3, and 1.9 mg/kg, respectively. The calculated national mean levels for DDT and HCH were 11.1 and 3.5 mg/kg, respectively. Although the values of DDT and HCH were not as high as those reported earlier, there is still a need for close monitoring of the bioaccumulation of these chemical residues in the Indian population.