2015—2018年深圳市罗湖区生活饮用水水质监测结果

Monitoring results of drinking water quality in Luohu District of Shenzhen City from 2015-2018

目的了解深圳市罗湖区生活饮用水水质卫生状况,为加强生活饮用水卫生管理工作提供理论依据和技术支持。方法按照GB/T 5750-2006《生活饮用水标准检验方法》采集辖区内3家水厂的出厂水和末梢水进行检测和分析,根据GB 5749-2006《生活饮用水卫生标准》对水样的各项指标进行判定,采用SPSS 20.0对数据进行统计分析。结果 2015—2018年期间深圳市罗湖区生活饮用水总合格率为75.37%,不同年度水质合格率分别为85.00%、85.41%、70.91%、65.00%,合格率呈逐年下降趋势(χ~2趋势=8.673,P<0.05)。2015年枯水期水质合格率高于丰水期,差异有统计学意义(χ~2=4.235,P<0.05)。A、B、C水厂的水质合格率分别87.50%、83.82%、59.49%,3家水厂的水质合格率差异有统计学意义(χ~2=17.783,P<0.05),水厂水质合格率从高到低依次为A>B>C。其中不合格率较高的指标分别是浑浊度、总大肠菌群、菌落总数、耐热大肠菌群等指标。结论深圳市罗湖区生活饮用水水质状况不容乐观,仍有较大的提升空间,相关部门应加强生活饮用水监管力度,保障饮用水健康和安全。

Objective To understand the sanitary status of drinking water in Luohu District of Shenzhen City,provide theoretical basis and technical support for strengthening the sanitation management of drinking water.Methods According to Standard Test Method for Drinking Water(GB/T 5750-2006),the finished water and terminal tap water from three water plants in Luohu District were collected for testing and analysis.According to the Hygienic standard for drinking water(GB 5749-2006),the indicators of the water samples were evaluated.The data were statistically analyzed using SPSS 20.0.Results The total qualified rate of drinking water in Luohu District of Shenzhen City during the period of 2015-2018 was 75.37%.The annual qualified rates of water quality in different years were 85.00%,85.41%,70.91%and 65.00%,respectively,showing a downward trend year by year(χ~2 trend=8.673,P<0.05).The qualified rate of drinking water in dry season in 2015 was higher than that in the wet season,and the difference was statistically significant(χ~2 trend=4.235,P<0.05).The qualified rate of drinking water of A,B and C water plants was 87.50%,83.82%and 59.49%respectively,the difference was statistically significant(χ~2 trend=17.783,P<0.05),and the qualified ra te of drinking water from high to low was A>B>C.The indicators with higher unqualified rate were turbidity,total coliform,total number of colonies,and heat-resistant coliforms.Conclusion The quality of drinking water in Luohu District is not optimistic,and it still has room for improvement.Relevant departments should strengthen the supervision of drinking water to ensure the health and safety of drinking water.