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    李盛, 贾清, 王宇红, 王金玉, 冯亚莉, 李守禹, 王龄庆, 成振香, 刘琼, 余加琳, 张英. 2017年兰州市农村集中式供水水质卫生及影响因素分析[J]. 环境卫生学杂志, 2019, 9(4): 335-338, 348. DOI: 10.13421/j.cnki.hjwsxzz.2019.04.005
    引用本文: 李盛, 贾清, 王宇红, 王金玉, 冯亚莉, 李守禹, 王龄庆, 成振香, 刘琼, 余加琳, 张英. 2017年兰州市农村集中式供水水质卫生及影响因素分析[J]. 环境卫生学杂志, 2019, 9(4): 335-338, 348. DOI: 10.13421/j.cnki.hjwsxzz.2019.04.005
    shu
    LI Sheng, JIA Qing, WANG Yuhong, WANG Jinyu, FENG Yali, LI Shouyu, WANG Lingqing, CHENG Zhenxiang, LIU Qiong, YU Jialin, ZHANG Ying. Water Quality and Influencing Factors of Centralized Water Supplies in Rural Lanzhou in 2017[J]. Journal of Environmental Hygiene, 2019, 9(4): 335-338, 348. DOI: 10.13421/j.cnki.hjwsxzz.2019.04.005
    Citation: LI Sheng, JIA Qing, WANG Yuhong, WANG Jinyu, FENG Yali, LI Shouyu, WANG Lingqing, CHENG Zhenxiang, LIU Qiong, YU Jialin, ZHANG Ying. Water Quality and Influencing Factors of Centralized Water Supplies in Rural Lanzhou in 2017[J]. Journal of Environmental Hygiene, 2019, 9(4): 335-338, 348. DOI: 10.13421/j.cnki.hjwsxzz.2019.04.005
    shu

    2017年兰州市农村集中式供水水质卫生及影响因素分析

    Water Quality and Influencing Factors of Centralized Water Supplies in Rural Lanzhou in 2017

      摘要
    • 摘要:
      目的 了解兰州市农村集中式供水水质卫生现状。
      方法 2017年简单随机（随机数字法）选取兰州市农村集中式供水工程188个进行供水情况调查。同时，采集枯水期和丰水期水样进行水质分析。
      结果 188个工程中，供水处理67.0%；消毒50.0%；按要求使用消毒设备占23.9%。共采集水样376件，合格率54.5%；水样合格率，丰水期低于枯水期，地下水低于地表水（χ2值：27.898、7.143，P < 0.05）。33项指标合格率在72.1%~100%，以总大肠菌群的合格率最低；与丰水期比较，枯水期总大肠菌群、耐热大肠菌群、大肠埃希氏菌和菌落总数的合格率均较高（χ2值：59.317、19.998、23.367和28.636，P < 0.05）；与地表水比较，地下水大肠埃希氏菌和浑浊度合格率较高，硝酸盐氮、氯化物、硫酸盐、溶解性总固体、总硬度的合格率较低（χ2值：7.419、15.020、5.212、13.808、23.222、26.998和45.599；P < 0.05）。
      结论 兰州市农村集中式供水水质主要存在微生物污染和理化指标超标的问题，应加强供水消毒和软化处理。

       

      Abstract:
      Objectives To understand the sanitary situation of centralized water supplies in Lanzhou rural areas.
      Methods 188 centralized water supply projects were selected randomly and investigated in Lanzhou rural areas in 2017. Water samples of dry season and wet season were collected and water quality was analyzed.
      Results Water supply treatments and disinfections were carried out in 67.0% and 50.0% of the 188 projects, respectively, and 23.9% used disinfection equipment as required. The qualified rate of 376 water samples was 54.5%. The qualified rate was lower in wet season than that in the dry season, and the qualified rate of groundwater was lower than that of the surface water (χ2=27.898, 7.143, P < 0.05). The range of qualified rate of 33 indexes were from 72.1% to 100.0%, of which total coliform bacteria was the lowest. The qualified rates of total coliform bacteria, thermotolerant coliforms, escherichia coli, and colony count in dry season were higher than those in wet season (χ2=59.317, 19.998, 23.367, 28.636, P < 0.05). The qualified rates of escherichia coli and turbidity of groundwater were higher than those of surface water, while the qualified rates of nitrate nitrogen, chloride, sulfate, soluble total solid, and total hardness were lower (χ2=7.419, 15.020, 5.212, 13.808, 23.222, 26.998, 45.599, P < 0.05).
      Conclusions The main problems of the water quality of centralized water supplies in Lanzhou rural areas are microbial contamination and over-standard physical and chemical indicators. Disinfection and softening of centralized water supplies should be strengthened.

       

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