2004年-2013年宜宾市区二次供水检测结果分析  

Analysis of the detection results of secondary water supply in Yibin from 2004 to 2013

作　　者：刘丹[1,2] 魏毅[2] 张炤[2] 曾莉[2] 易松涛 

机构地区：[1]四川大学华西公共卫生学院,四川成都610041 [2]四川宜宾市疾病预防控制中心,四川宜宾644000

出　　处：《中国卫生检验杂志》2014年第8期1165-1167,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的了解宜宾市市区二次供水质量情况,为宜宾市饮用水的质量监督管理提供科学依据,保障居民用水安全。方法根据2004年-2013年10年间宜宾市疾病预防控制中心对宜宾市市区二次供水检测所得的结果进行分析,对各年的合格率情况进行了统计分析,统计不合格项目的件数,游离性余氯的最大值、最小值和平均值,并比较了同时期末梢水的测定结果。结果各年份合格率无统计学意义(χ2=8.977,P>0.05),宜宾市市区二次供水10年平均合格率为85.9%,低于末梢水合格率93.2%,不合格项目主要为大肠菌群8.88%,细菌总数3.85%,游离性余氯2.51%,游离性余氯最大值为1.0 mg/L,最小值为0.02 mg/L,平均值普遍偏低。结论宜宾市市区二次供水基本符合国家标准,但应加强对二次供水情况的监管,适当增加检测项目,并提高二次供水的消毒水平。Objective To understand the quality of secondary water supply in Yibin city,and provide scientific basis for supervision and administration of drinking water,so as to ensure the safety of public drinking. Methods The test results of the secondary water supply including tap water from 2004 to 2013 were collected to analyze the average pass rate of each year,the unqualified cases,and the maximum,minimum,average contents of the free residual chlorine. Results The difference of the average pass rate of each year had no statistical significance（ χ^2= 8. 977,P〉 0. 05）. The average pass rate of secondary water supply in Yibin was 85. 9% in the past ten years,lower than that of tap water（ 93. 2%）. The main unqualified items were total coliform group（ 8. 88%）,total bacterial count（ 3. 85%）,and free residual chlorine（ 2. 51%）. The maximum content of free residual chlorine was 1. 0 mg/ L,while the minimum content was 0. 02 mg/ L and the average was generally low. Conclusion The quality of the secondary water supply in Yibin city can basically meet the national standard,but the supervision of secondary water supply still need to be strengthened. In addition,the test items should be increased properly,and the level of the free residual chlorine also should be improved in secondary water supply.

关 键 词：二次供水 末梢水 水质 

分 类 号：R123.1[医药卫生—环境卫生学]