1997～2001年乌鲁木齐市饮用水水质分析

Analysis of Drinking Water Quality in Urumqi City During 1997～2001

为掌握乌鲁木齐市生活饮用水水质及变化趋势 ,于 1997～ 2 0 0 1年 ,每年对全市 6个水厂的水源水、出厂水各监测 2次 ,并在全市共布 6 1个管网水及 72个二次供水监测点 ,每季度监测 1次 ,依据 GB5 74 9- 85《生活饮用水卫生标准》进行水质评价 .结果显示 :1997～ 2 0 0 1年 ,地面水源水检测项目的合格率明显下降 (χ2 =12 .93,P<0 .0 1) ,出厂水中历年地面水水质的合格率与地下水比较差异均有显著性 ,管网水细菌总数合格率也逐年降低 (χ2 =15 .37,P<0 .0 1) ,二次供水细菌学指标变化不明显 ,表明 1997～ 2 0 0 1年乌鲁木齐市地面水水质呈下降趋势 ,地面水水质优于地下水。

To understand the drinking water quality and the dynamic tendency. During 1997 ~2001,the sanitary quality of the water samples,which were collected from the water source and the produced water two times a year and the monitoring locations including 61 water supply network and 72 secondary supply water once a quarter,were monitored and were assessed according to the National criteria for Drinking water GB5749-85. Results showed that,During 1997～2001,the qualified rate of monitoring indexes in the surface source water and the qualified rate of total bacterial count in water supply network presented a lowing trend year after year(χ 2 =12.93,15.37, P<0.01), the qualified rates of monitoring indexes presented significant differences between the surface produced water and the underground produced water,no significant differences was observed in the qualified rates of bacteriology in the secondary supply water.The results indicated that, during 1997～2001,the surface water quality presented a decreasing trend,the surface produced water quality was superior to the underground produced water in Urumqi.