2014年-2016年某城市生活饮用水水质卫生状况分析

Analysis of urban drinking water's sanitary quality in a city during 2014-2016

目的对2014年-2016年某城市生活饮用水水质状况进行分析。方法收集2014年-2016年某市四区三县疾病预防控制中心对市政供水、二次供水、自建供水的监测数据,对监测数据进行描述分析。结果 2014年-2016年该市共监测765份水样。管网末梢水合格率(79.21%)高于出厂水合格率(57.58%),市政供水末梢水合格率(79.50%)高于市政供水出厂水合格率(59.26%),二次供水合格率高于市政供水末梢水合格率(89.09%),差异均有统计学意义(P<0.05)。水质不合格项目主要为消毒剂指标(游离余氯和二氧化氯)。结论 2014年-2016年影响该市生活饮用水合格率的主要指标为消毒剂指标。相关部门应重点加强水质尤其是出厂水消毒效果的监测。水厂尤其县级水厂、自建水厂应改善制水工艺。

Objective To analyze the drinking water quality in a city from 2014 to 2016. Methods To collect the monitoring data of municipal water supplying,secondary supplying,self-construction supplying from four districts and three counties＇ CDCs in a city,and to descript and analyze these data. Results 765 water samples were monitored during 2014-2016. The qualification rate of tap water（ 79. 21%） was higher than that of the finished water（ 57. 58%）,and the qualification rate of the municipal tap water（ 79. 50%） was higher than that of the finished water（ 59. 26%）. The qualification rate of the secondary supplying water was higher than that of the municipal tap water（ 89. 09%）,and the differences were statistically significant（ P〈0. 05）. The unqualified item was mainly disinfectant（ free chlorine residual and chlorine dioxide）. Conclusion The main indexes of hydration rate in drinking water are disinfectant indicators in the city during 2014-2016. Relevant departments should pay more attention to improve water quality,especially the sterile monitor of tap water. The waterworks,especially county-level waterworks and self-construction waterworks should improve the technology of water production.