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目的分析2014—2016年盐城市区二次供水水质情况及变化趋势,为二次供水质量监督提供科学依据。方法水样采集和评价分别按照《生活饮用水卫生标准》(GB 5749-2006)和《生活饮用水标准检验方法》(GB/T 5750-2006)进行。结果 2014—2016年共采集、监测二次供水241份,合格214份,合格率为88.8%,各年份的合格率差异有统计学意义(χ~2=18.029,P<0.05)。结论菌落总数是影响盐城市区二次供水水质的主要因素。市区二次供水水质基本符合国家卫生标准,但仍有不合格因素。应加强二次供水的管理清洁维护,加大二次供水的监测力度。
Objective To analyze the secondary water quality and its changing trend in Yancheng city from 2014 to 2016, and provide a scientific basis for the quality supervision of secondary water supply. Methods The sampling and evaluation of water samples were carried out according to the standards of Sanitary Standard for Drinking Water (GB 5749-2006) and Standard Test Method for Domestic Drinking Water (GB / T 5750-2006) respectively. Results A total of 241 secondary water supplies were collected during 2014-2016, of which 214 were qualified, with a pass rate of 88.8%. There was significant difference in pass rates between years (χ ~ 2 = 18.029, P <0.05). Conclusion The total number of colonies is the main factor affecting the secondary water quality in Yancheng urban area. Urban secondary water quality basically in line with national health standards, but there are still unqualified factors. Should strengthen the secondary water supply management, cleaning and maintenance, increase the monitoring of secondary water supply.