DDT (ng/m2) DDT as a % of total OCsa 4,4'-DDE (ng/m2) 4,4'-DDE as a % of total OCsb Total OCs (ng/m2) Median 11.2 2.9% 66 24.8% 287 Minimuma 0.5 0.1% 0.5 0.3% 11.0 Maximum 24.9 14.3% 11,500 97.0% 11,900 aThe median, minimum and maximum values for DDT as a % of total OCs were calculated by determining this percentage for each home individually, then selecting the median, minimum and maximum values out of the values for all homes in both villages. bThe median, minimum and maximum values for 4,4’-DDE as a % of total OCs were calculated in the same manner as the calculations for DDT (see footnote a). cThe reporting limit for the OC pesticides was 1 ng/m2. Levels of pesticides that were detectable but below the reporting limit were assigned a value of 0.5 ng/m2.

Table 3: Levels (ng/m2) of dichlorodiphenyltrichloroethane (DDT) and dichlorodiphenyldichloroethylene (4,4’-DDE) across all house dust samples in both Kafaldanda and Keraghari, Nepal, and levels of each as a percentage of total organochlorine pesticides (OCs).