2014—2016年北京市海淀区自备井水质卫生状况

Hygienic status of self-drilled well water in Haidian District of Beijing from 2014-2016

目的了解2014—2016年北京市海淀区自备井的水质卫生状况和变化趋势,确保自备井水的卫生安全,为今后加强自备井的卫生监督管理,保障居民安全饮水提供科学依据。方法按照GB/T 5750-2006)《生活饮用水标准检验方法》进行样品采样和检验,依据GB 5749-2006《生活饮用水卫生标准》对水质检测结果进行评价。结果 2014—2016年共检测自备井水478份,总体合格率81.6%。3年合格率分别为83.9%,79.9%,81.0%,不同年份合格率差异无统计学意义(χ~2=0.891,P>0.05)。检测的17项指标中有7项指标出现过超标情况,其中超标项目前3项为菌落总数、总硬度和氟化物。消毒设施运转正常的自备井合格率高于消毒设施未正常运转的自备井。结论 2014—2016年北京市海淀区自备井水存在一定程度的污染,应加强对自备井的监督管理,采取针对性的改善措施,保障饮水安。

[Objective] To understand the hygienic quality and change trend of self-drilled well water in Haidian District of Beijing from 2014-2016, ensure the hygienic security of self-drilled well water, and provide the scientific evidence for strengthening the hygienic supervision and management of the self-drilled wells and ensuring safety drinking water in the future.[Methods] The sampling and testing were performed according to the Standard Examination Methods for Drinking water（GB/T5750-2006）,and the results were evaluated according to the Hygienic Standard for Drinking Water（GB5749-2006）.[Results]A total of 478 self-drilled well water samples were detected from 2014-2016,with total qualified rate of 81.6%. The annual qualified rate was respectively 83.9%,79.9% and 81.0%,and the difference was not statistically significant（χ~2=0.891,P〉0.05）. There were the unqualified results in 7 indexes among 17 indexes,and top three unqualified indexes were colony count,total hardness and fluoride. The qualified rates of the self-drilled wells with disinfection facilities were higher than those of wells without disinfection facilities. [Conclusion] There is certain degree of pollution in some self-drilled wells in Haidian District of Beijing from 2014-2016. It is necessary to strengthen the supervision and management of the self-drilled wells,and take the targeted measures to ensure the safety of drinking water.