The German Environmental Survey (GerES) is a large-scale population study which has repeatedly been carried out in Germany. GerES I was conducted in 1985/86 followed by GerES II in 1990/92 and GerES III in 1998. In GerES III about 750 samples of house dust collected in homes of the study participants were analysed for their content of PCP, lindane, DDT, propoxur, methoxychlor, chlorpyrifos, pol...