2019—2021年重庆市万州区生活饮用水中铝元素监测结果分析

Monitoring results of aluminum in drinking water in Wanzhou District of Chongqing from 2019 to 2021

目的了解重庆市万州区生活饮用水铝含量变化情况,为政府及相关部门决策提供科学依据。方法收集整理2019-2021年生活饮用水监测资料,采用SPSS 25.0和Graphpad Prism 8.0软件对其铝元素相关检测结果进行统计分析,检验水准α=0.05。结果2019-2021年共监测1072份水样,铝总合格率为83.86%;不同年份之间铝合格率差异有统计学意义(χ^(2)=25.581,P<0.001);枯水期水样合格率高于丰水期(χ^(2)=4.308,P=0.038);城市生活饮用水合格率高于农村生活饮用水(χ^(2)=8.053,P=0.005);但出厂水与末梢水的合格率差异均无统计学意义。结论2019—2021年万州区生活饮用水铝合格率呈现逐年上升趋势。仍需继续加强生活饮用水的卫生管理和监督检测工作,合理规范投加混凝剂,进一步提高水质质量。

Objective To understand the change of aluminum content in drinking water in Wanzhou District,Chongqing,and to provide scientific basis for government and related departments to make decisions.Methods The monitoring data of drinking water from 2019 to 2021 were collected.The aluminum levels were analyzed statistically by using SPSS 25.0 and Graphpad Prism 8.0 software.The test level wasα=0.05.Results A total of 1072 water samples were monitored from 2019 to 2021,and the total aluminum qualified rate was 83.86%.There was significant difference in aluminum qualification rate among different years(χ^(2)=25.581,P<0.001).The qualified rate of aluminum levels in water samples in dry season was higher than that in wet season(χ^(2)=4.308,P=0.038).The qualified rate of aluminum levels of urban drinking water sample was higher than that of rural area(χ^(2)=8.053,P=0.005).But there was no statistical difference between the qualified rate of the factory water and the terminal water.Conclusions The qualified rate of aluminum level in drinking water in Wanzhou District increased yearly from 2019 to 2021.It is still necessary to continue to strengthen the sanitary management and supervison and testing of drinking water,and to add coagulants in a reasonable standard to further improve the quality of drinking water.