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合格率100%!北京市市级集中式生活饮用水水质状况 (2022年第四季度)

2023-01-18 10:14:33来源:北京市生态环境局 阅读量:13342

导读:2022年4季度,2个地表水水源、3个地下水水源,水质全部达标,达标率为100.0%;18座自来水厂出厂水,水质全部合格,达标率为100.0%;92个市级集中式生活饮用水城市末梢水水质监测点,检测水样103件,合格率100.0%。
北京市市级集中式生活饮用水水质状况 (2022年第四季度)
 
  为贯彻落实《中华人民共和国环境保护法》《北京市水污染防治工作方案》,提高公众对生活饮用水水质信息的知情权,本市从2016年起,每季度公布北京市市级集中式生活饮用水(饮用水水源、自来水厂出厂水和城市末梢水)水质状况。
 
  一、监测情况
 
  (一)监测点位
 
  1.饮用水水源
 
  2022年4季度,全市共监测5个市级集中式生活饮用水水源,其中,地表水水源2个(密云水库、南水北调)、地下水水源3个(海淀花园村地区、朝阳花家地地区、密怀顺地区)。
 
  2.自来水厂出厂水
 
  2022年4季度,共监测18座城市自来水厂出厂水水质。
 
  3.城市末梢水
 
  2022年4季度,市级集中式生活饮用水设置92个城市末梢水监测点。
 
  (二)监测项目
 
  1.饮用水水源
 
  地表水水源每月进行《地表水环境质量标准》(GB 3838-2002)中表1的基本项目(23项,化学需氧量除外)、表2的补充项目(5项)和表3的优选特定项目(33项),共61项指标的检测,每年进行一次全部109项指标的检测。
 
  地下水水源每月进行《地下水质量标准》(GB/T 14848-2017)中39项常规指标的检测,每年进行一次全部93项指标的检测。
 
  2.自来水厂出厂水
 
  监测项目按照《生活饮用水卫生标准》(GB 5749-2006)的要求,每月对各自来水厂出厂水进行42项常规指标的检测,每半年对地表水厂出厂水进行全部106项指标的检测,每年对地下水厂出厂水进行全部106项指标的检测,确保出厂水水质安全。
 
  3.城市末梢水
 
  监测项目按照《生活饮用水卫生标准》(GB 5749-2006)的要求,对城市末梢水监测水样进行常规指标检测。
 
  (三)评价标准及方法
 
  1.饮用水水源
 
  地表水水源根据《地表水环境质量标准》(GB 3838-2002),采用单因子评价法进行评价。每项指标均符合相应标准要求时,认为水质合格。
 
  地下水水源根据《地下水质量标准》(GB/T 14848-2017),采用单因子评价法进行评价。每项指标均符合相应标准要求时,认为水质合格。
 
  2.自来水厂出厂水
 
  自来水厂出厂水根据《生活饮用水卫生标准》(GB 5749-2006),采用单因子评价法进行评价。每项指标均符合相应标准要求时,认为水厂出水水质合格。
 
  3.城市末梢水
 
  城市末梢水根据《生活饮用水卫生标准》(GB 5749-2006)对监测水样进行评价,对不合格指标根据对人体健康危害程度给予健康提示。
 
  二、评价结果
 
  (一)饮用水水源水质
 
  2022年4季度,2个地表水水源、3个地下水水源,水质全部达标,达标率为100.0%。
 
  (二)自来水厂出厂水水质
 
  2022年4季度,18座自来水厂出厂水,水质全部合格,达标率为100.0%。
 
  (三)末梢水水质
 
  2022年4季度,92个市级集中式生活饮用水城市末梢水水质监测点,检测水样103件,合格率100.0%。
 
  评价结果详见表1-表3。
 
  附表

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