DDT and HCH ( Organochlorine Pesticides) in Residential Soils and Health Assessment for Human Populations in Korba, India

Dichlorodiphenyltrichloroethane (DDT), hexachlorocyclohexane (HCH), and their isomers' levels in residential soils were determined for the assessment of health risk in Korba, India. Observed concentrations of total HCH and total DDT in soils were more or less comparable with other parts of India and the world. sigma HCH and sigma DDT concentrations ranged between 0.9-20g kg(-1) and 2-315g kg(-1), respectively, which were lower than recommended soil quality guidelines indicating low ecotoxicological risk. Carcinogenic and non-carcinogenic impacts of HCH and DDT on human populations through soil ingestion were evaluated and presented. The incremental lifetime cancer risk (ILCR) for adults and children ranged between 7.8 x 10(-10)-1.6 x 10(-7) and 4.1 x 10(-9)-8.2 x 10(-7), respectively. Non-cancer health hazard quotient (HQ) ranged between 5.9 x 10(-7)-1.8 x 10(-3) and 3.1 x 10(-6)-9.4 x 10(-3), respectively, for adults and children. The estimated ILCR and HQ were within the safe acceptable limits of 10(-6)-10(-4) and 1.0, respectively, indicating low risk to human populations from exposure to organochlorine pesticides (HCH and DDT) in the study area.