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为了解南充市饮用水挥发性卤代烃（ＶＨＨ）污染水平，于１９９２～１９９８年采集市政供水和自备集中式供水样１２８件，以气相色谱法分析氯仿（ＣＨＣｌ３）和四氯化碳（ＣＣｌ４）含量。结果表明全部水样均检出ＣＨＣｌ３（０．０６～２２．１３μｇ／Ｌ）和ＣＣｌ４（０．０２～２．５μｇ／Ｌ）。管网水ＶＨＨ含量（４．４５μｇ／Ｌ）为源水（２．５２μｇ／Ｌ）的１．８倍，地面水（３．７２μｇ／Ｌ）为地下水（２．９６μｇ／Ｌ）的１．３倍，出厂水（４．０９μｇ／Ｌ）为地面水（２．２８μｇ／Ｌ）的１．８倍。自备供水（４．９５μｇ／Ｌ）为市政供水（１．２８μｇ／Ｌ）的３．９倍，自来水丰水期（３．８１μｇ／Ｌ）为枯水期（３．２３μｇ／Ｌ）的１．２倍。与国内和其它国家、地区的检测结果相比，该市饮用水中ＣＨＣｌ３含量处于较低水平。
In order to understand the pollution level of volatile halogenated hydrocarbons (VHH) in drinking water in Nanchong City, municipal water supply and 128 centralized water supply samples were collected from 1992 to 1998. The contents of CHCl3 and carbon tetrachloride (CHCl3) were analyzed by gas chromatography CCl4) content. The results showed that all samples were detected CHCl3 (0.06 ~ 22.13μg / L) and CCl4 (0.02 ~ 2.5μg / L). The VHH content (4.45μg / L) of pipe network water was 1.8 times that of source water (2.52μg / L) and the surface water (3.72μg / L) was 1.3 Times, factory water (4.09μg / L) of surface water (2.28μg / L) of 1.8 times. The municipal water supply (4.95μg / L) was 3.9 times higher than the municipal water supply (1.28μg / L) and the water supply period (3.81μg / L) was 1.2 Times Compared with the test result in China and other countries and regions, the content of CHCl3 in drinking water of this city is at a low level.