The HQs of the 14 OCPs through drinking shallow groundwater for individuals were also calculated according to the assessment model. According to the standards (US EPA, 1986), when the ratio exceeds 1, it means that it has an adverse human health effect. The non-carcinogenic risks from all the 14 OCPs for adults and children were much less than 1, suggesting that these OCPs in the shallow groundwater of TLR were considered unlikely to pose any noncarcinogenic
effects to individuals. Non-carcinogenic risk from each pollutant in the shallow groundwater of TLR was in the order of heptachlor epoxide