2017年广州市市政管网末梢水卫生状况及对策分析  

Analysis of the drinking water quality of Guangzhou in 2017

作　　者：李琴[1] 王德东[1] 周金华 黄仁德[1] 黎晓彤[1] 钟嶷[1] LI Qin;WANG De-dong;ZHOU Jin-hua;HUANG Ren-de;LI Xiao-tong;ZHONG Yi(Guangzhou Center for Disease Control and Prevention,Guangdong510440,China)

机构地区：[1]广州市疾病预防控制中心,广东510440

出　　处：《医学动物防制》2021年第9期916-918,共3页Journal of Medical Pest Control

基　　金：广州市医药卫生科技项目(20191A011052)。

摘　　要：目的了解广州市市政管网末梢水卫生现状,为改善居民生活饮用水水质提供科学依据。方法 2017年全市12个区设立222个市政管网末梢水监测点,每个监测点在丰水期和枯水期各采集1份水样进行监测,监测项目为生活饮用水常规项目34项。监测结果按照《生活饮用水卫生标准》(GB/T 5749—2006)中标准限值进行评价。结果 2017年广州市12个区管网末梢水共检测水样443份,合格406份,总体合格率为91.65%,各区合格率差异有统计学意义(χ^(2)=39.643,P<0.01);共检测项目14 975项,合格14 931项,合格率99.71%。不合格项目主要为游离余氯、铁、铅、浑浊度、菌落总数、耗氧量、氨氮、镉、锰、二氧化氯及氯酸盐等;且进一步不合格项目之间比较,游离余氯不合格最多(F=111.46,P<0.01)。结论广州市管网末梢水的游离余氯及细菌总数两个项目合格率较低,今后应加强对生活饮用水氯化消毒,对管网的检修及管网末梢水的监测。Objective To investigate the hygiene condition of municipal tap water in Guangzhou, and provide a scientific basis for improving the drinking water quality of the residents.Methods A total of 222 municipal pipe network end water monitoring points were set up in 12 areas of Guangzhou in 2017.One water sample was collected for each monitoring point in the wet season and the dry season for monitoring, the monitoring projects included 34 routine domestic drinking water projects.The monitoring results were evaluated according to The Standard Limits In The Hygienic Standard For Drinking Water(GB/T 5749—2006).Results A total of 443 water samples were analyzed in 12 districts of Guangzhou for end water of pipe network in 2017,406 water samples were qualified, with the overall qualified rate of 91.65%.There was a significant difference in the qualified rate among districts(χ^(2)=39.643,P<0.01).A total of 14 975 items were tested and 14 931 items were qualified, with a passing rate of 99.71%.The free residual chlorine, iron, lead, turbidity, total colony count, oxygen consumption, ammonia nitrogen, cadmium, manganese, chlorine dioxide and chlorate were above the safety standard, and further comparison between the failed items, the unqualified samples of free residual chlorine was the most(F=111.46,P<0.01).Conclusion In Guangzhou, the level of free residual chlorine and total bacterial count in the water at the end of the pipeline network were high in drinking water.In the future, chlorination and disinfection of drinking water, maintenance of the pipeline network and monitoring of the water at the end of the pipeline network should be strengthened.

关 键 词：末梢水 水质 生活饮用水 卫生状况 对策 

分 类 号：R123[医药卫生—环境卫生学]