2020年南京市鼓楼区中小学管道直饮水水质检测结果分析

Analysis of the Test Results of Direct Drinking Water Quality of Pipes for Primary and Secondary Schools in Gulou District,Nanjing in 2020

为研究2020年南京市鼓楼区中小学管道直饮水卫生情况,并探讨其与往年管道直饮水及管网末梢水卫生状况的差异,检测2016年管道直饮水样本35份,2020年管道直饮水与管网末梢水配对样本各26份,并对水质状况进行分析。结果显示:2016年检测管道直饮水样本35份,合格25份,合格率71.4%;2020年管道直饮水样本26份,合格25份,合格率96.2%。合格率差异有统计学意义。2020年直饮水与末梢水比较,管道直饮水的耗氧量、总硬度、菌落总数结果较管网末梢水有所降低(P<0.05)。可见,南京市鼓楼区中小学生管道直饮水卫生质量较往年有所提高,直饮水设备对水质净化起到一定积极作用,但使用不当也会带来安全隐患,有关部门应加强对直饮水设备使用的培训、监管,保障青少年饮水安全。

In order to study the sanitary status of direct drinking water from pipes in primary and secondary schools in Gulou District,Nanjing in 2020,and to explore the differences between the sanitary conditions of direct drinking water from pipes and the end of the pipe network in previous years,35 samples of direct drinking water from pipes were tested in 2016,and 26 samples of paired direct drinking water from pipes and pipe network terminal water were tested in 2020,and the water quality was analyzed.The results showed that in 2016,35 samples of direct drinking water from the pipeline were tested,25 of which were qualified,with a pass rate of 71.4%;In 2020,there were 26 samples of direct drinking water from pipes,25 of which were qualified,with a pass rate of 96.2%.The difference in pass rate is statistically significant.Comparing direct drinking water with peripheral water in 2020,the results of oxygen consumption,total hardness,and total number of colonies of direct drinking water from pipelines were lower than those of peripheral water in the pipeline network(P<0.05).Therefore,the sanitary quality of direct drinking water for primary and secondary school students in Gulou District,Nanjing City has improved compared with previous years,and direct drinking water equipment has played a positive role in water purification,but improper use will also bring safety hazards,the relevant departments should strengthen training and supervision on the use of direct drinking water equipment to ensure the safety of drinking water for young people.