2022—2023年河南省南阳市生活饮用水水质监测结果  

Monitoring results of drinking water quality in Nanyang City of Henan Province from 2022 to 2023

作　　者：何旺杰[1] 李莉 许国选 李永忠[1] HE Wangjie;LI Li;XU Guoxuan;LI Yongzhong(Nanyang Center for Disease Control and Prevention,Nanyang,Henan 473000,China)

机构地区：[1]南阳市疾病预防控制中心,河南南阳473000

出　　处：《现代疾病预防控制》2024年第8期639-642,共4页MODERN DISEASE CONTROL AND PREVENTION

摘　　要：目的了解南阳市生活饮用水水质状况,探讨影响水质卫生的主要因素,为进一步提升城乡生活饮用水水质提供科学依据。方法2022—2023年分别在南阳辖区内设置城市和农村生活饮用水监测点,调查监测点供水单位基本情况,并于枯水期、丰水期各采集1次水样,按照《生活饮用水标准检验方法》(GB/T 5750—2006/2023)进行微生物、毒理、感官性状和一般化学指标等检测,结果依据《生活饮用水卫生标准》(GB5749—2006/2022)限值进行评价。结果2022—2023年南阳市共调查302个供水单位,小型规模供水单位259个,占85.76%;农村275个,占91.06%;地下水272个,占90.07%;水处理方式仅消毒217个,占71.85%;二氧化氯消毒253个,占83.78%。共检测2330份水样,合格2118份,合格率为95.19%,城市饮用水合格率(98.94%)高于农村(94.25%),地下水合格率(96.44%)高于地表水(87.87%),饮用水合格率常规处理(97.49%)、沉淀过滤(95.69%)、仅消毒(94.79%)高于不处理的(90.63%)(χ^(2)值分别为18.03、46.34、14.34,P均<0.05)。不合格指标有8个,各指标不合格率差异有统计学意义(χ^(2)=100.80,P<0.05);菌落总数、硝酸盐氮和总大肠菌群不合格率较高,均>1%。结论南阳市城市饮用水合格率高于农村,水处理工艺是影响水质的重要因素,微生物指标是影响水质的主要指标,建议相关部门加强水源保护、水质消毒和供水卫生管理,进一步提高生活饮用水水质,确保城乡居民饮用水卫生安全。Objective To understand the quality of drinking water in Nanyang City,Henan Province,and explore the main factors affecting the quality of drinking water,so as to provide scientific basis for further improving the quality of drinking water in urban and rural areas.Methods From 2022 to 2023,urban and rural drinking water monitoring sites were set up in Nanyang jurisdiction,and the basic situation of water suppliers at each monitoring site was investigated.Water samples were collected once during dry season and wet season respectively;microbial,toxicological,sensory properties and general chemical indexes were detected according to the Standard Test Method for Drinking Water(GB/T 5750-2006/2023),and the results were assessed according to the limit value of the Standard for Drinking Water Quality(GB 5749-2006/2022).Results From 2022 to 2023,a total of 302 water suppliers were investigated in Nanyang City,and 259 small-sized water suppliers,accounting for 85.76%;275suppliers were in rural areas,accounting for 91.06%.There were 272 suppliers using underground water,accounting for 90.07%;217 suppliers conducted water treatment with disinfection only,accounting for 71.85%;253 suppliers conducted disinfection using chlorine dioxide,accounting for 83.78%.A total of 2330 water samples were tested,and of them,2218 were qualified,with the qualified rate of 95.19%.The qualified rate was higher for urban drinking water(98.94%)than that for rural water(94.25%),higher for underground water(96.44%)than that for surface water(87.87%),and higher for treated and disinfected drinking water(97.4%,95.69%,94.79%)than that for untreated drinking water(90.63)(χ^(2)values were 18.03,46.34,14.34,respectively,all P<0.05).There were 8 unqualified indexes,and the difference in the unqualified rates for indexes was statistically significant(χ^(2)=100.80,P<0.05).The unqualified rates of the total number of colonies,nitrate nitrogen and total coliform were relatively high,and all of them were more than 1%.Conclusions The qualified rate of drink

关 键 词：生活饮用水 水质 南阳市 

分 类 号：R123.1[医药卫生—环境卫生学]