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为研究有机氯农药对西安市饮用水的污染状况，用气相色谱法测定了西安市２１个点自备井水中六六六、滴滴涕的含量。结果表明，２１个采样点饮用水中六六六的检出率为１００％，滴滴涕的检出率为１４．３％。结果提示六六六、滴滴涕由于其化学性质稳定及高残留性所引起的远期危害不容忽视
In order to study the pollution status of organochlorine pesticides to drinking water in Xi’an City, the content of BHC and DDT in 21 wells of Xi’an city was measured by gas chromatography. The results showed that the detection rate of bHC in 21 samples was 100% and that of DDT was 14.3%. The results suggest that 666, DDT because of its chemical stability and high residue caused by the long-term hazards can not be ignored