东部某县2021年与2020年生活饮用水水质监测结果对比及原因分析

Comparison of Drinking Water Quality Monitoring Results and Causes Between 2021 and 2020 in a County in Eastern of China

本文监测并分析了近两年山东省临沂市沂南县城乡居民生活饮用水水质卫生状况,为有关部门作出决策提供科学依据。按照《生活饮用水标准检验方法》(GB/T 5750—2006)进行采样、检测和评价。截至2021年9月,共检测生活饮用水水样382批次,其中不合格70批次,总体问题发现率为18.3%;2020年同期共检测水样197批次,不合格104批次,总体问题发现率为52.8%,不合格项目主要为总大肠菌群、耐热大肠菌群、菌落总数等。表明2021年沂南县生活饮用水水质比2020年同期水质合格率有了大幅提升,不合格参数主要集中在微生物污染,这可能是由自备井消毒不到位导致。建议加强生活饮用水管网消毒,提高饮用水质量。

This paper monitored and analyzed the drinking water quality of urban and rural residents in Yinan county,Linyi city in recent two years,providing scientific basis for relevant departments to make decisions.Sampling,detection and evaluation shall be carried out according to GB/T 5750—2006.By the middle of September 2021,382 drinking water samples had been tested,of which 70 were unqualified.the overall problem discovery rate was 18.3%;In the same period of 2020,197 water samples were tested,104 of which were unqualified.the overall problem discovery rate was 52.8%.The unqualified items mainly included total coliform bacteria,heat-resistant coliform bacteria,total bacterial count,etc.It shows that the qualified rate of drinking water quality in a county in the East in 2021 is significantly higher than that in the same period in 2020.The unqualified parameters mainly focus on microbial pollution,which may be caused by inadequate disinfection of self provided wells.It is suggested to strengthen the disinfection of drinking water pipe network and improve the quality of drinking water.