2018—2021年深圳市罗湖区中小学校及托幼机构管道直饮水监测结果分析

Analysis on monitoring results of piping drinking-water of primary and secondary schools and kindergartens in Luohu District of Shenzhen City from 2018-2021

目的对2018—2021年深圳市罗湖区中小学校及托幼机构管道直饮水监测结果进行分析,了解并掌握直饮水水质现状及变化趋势,为科学系统的管理管道直饮水,确保学生饮用水安全提供数据支持。方法样本按照GB/T 5750—2006《生活饮用水标准检验方法》检测4类21项指标,并对数据进行分析。结果2018—2021年共检测中小学校及托幼机构管道直饮水743份,总体合格率为74.43%,不同年度管道直饮水合格率呈下降趋势(χ_(趋势)^(2)=7.222,P<0.05)。管道直饮水总体合格率(74.43%)低于末梢水(91.48%),差异有统计学意义(χ^(2)=34.683,P<0.05);4年间只有2021年管道直饮水春季(79.31%)、秋季(58.33%)合格率差异有统计学意义(χ^(2)=12.516,P<0.05);管道直饮水不合格指标主要为细菌总数、浑浊度、耗氧量和pH值。结论2018—2021年深圳市罗湖区中小学校及托幼机构管道直饮水合格率呈下降趋势,但水质安全问题仍然突出,学校应加强饮用水管理工作,卫生部门应加大检查监督力度,共同保证学生饮用水安全。

Objective To understand and master the current situation and variation tendency of direct-drinking water quality by analyzing the monitoring results of piping drinking-water of primary and secondary schools and kindergartens in Luohu District of Shenzhen City from 2018-2021,provide data support for scientific and systematic management of piping drinking-water and ensuring the safety of drinking water for students.Methods The samples were tested according to the standard test method for drinking water (GB/T 5750-2006) for 21 indexes of four categories,and the data were analyzed.Results From 2018 to 2021,743 samples of piping drinking-water were tested in primary and secondary schools and kindergartens ,the overall qualified rate was 74.43%,and the qualified rate of water showed a downward trend in different years (χ_(trend)^(2)=7.222,P<0.05).The overall qualified rate of piping drinking-water(74.43%) was lower than that of terminal water(91.48%),and the difference was statistically significant(χ^(2)=34.683,P<0.05).In the past four years,only the difference in the qualified rate of piping drinking-water between spring and autumn in 2021 was statistically significant (χ^(2)=12.516,P<0.05).The unqualified indexes of piping drinking-water were mainly include total number of bacteria,turbidity,oxygen consumption and pH value.Conclusion The qualified rate of piping drinkingwater in primary and secondary schools and kindergartens in Luohu District of Shenzhen Cit from 2018-2021 shows a downward trend,the problem of water quality safety is serious, the schools should strengthen the management of drinking water,and health departments should strengthen inspection and supervision to jointly ensure the safety of drinking water in schools.