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本文对南充市两自来水公司１９９５～１９９６年水源水、出厂水和管网水监测结果作了分析，结果表明，供水的感官性状及部分一般化学指标、细菌学指标是构成水质不合格的主要原因，其前三位指标为浑浊度、游离性余氯、总大肠菌群、超标率分别为５０．７４％、１８．３４％、５．３３％。毒理学指标符合ＧＢ５７４９－８５规定限量。水源水质符合规定标准要求。各类水样均检出三卤甲烷类化合物（ＴＨＭｓ）。与水有关传染病９６年较９５年明显增高，统计学上有非常显著性差异（Ｐ＜０．００１）。
In this paper, the results of monitoring of water source, ex-factory water and pipe network water of two water companies in Nanchong City from 1995 to 1996 were analyzed. The results showed that the sensory characteristics of water supply and some general chemical and bacteriological indexes were the main reasons for the unqualified water quality , The first three indicators of turbidity, free residual chlorine, total coliform bacteria, exceeding the standard rates were 50.74%, 18.34%, 5.33%. Toxicological indicators in line with the provisions of GB5749-85 limit. Water quality meets the required standard. All kinds of water samples are detected trihalomethanes (THMs). In 1996, the number of water-related infectious diseases was significantly higher than that of 1995, with a statistically significant difference (P <0.001).