2014—2016年盐城市区二次供水水质监测结果分析

Quality of secondary water supplies in Yancheng urban areas, 2014-2016

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 hygienic condition of secondary water supplies in Yancheng urban area from 2014 to 2016, so as to provide the basis for improving the health supervision and management of secondary water supplies. Methods The secondary water supply samples were collected and evaluated according to Drinking Water Quality （GB 5749-2006） and The Standard Examination Methods for Drinking Water （GB/T 5750-2006）, respectively. Results A to- tal of 241 water samples were collected and monitored from 2014 to 2016, in which 214 samples were qualified, with the qualified rates of 88.8%. There was a significant difference （x^2=18.029, P〈0.05） among the three years. The total bacteria count was the key factor influencing the hygienic condition of secondary water supplies. Conclusion The total bacteria count is the principle factor influencing the hygienic condition of secondary water supplies in Yancheng City. The quality of secondary water supplies in Yancheng City is conformed to the national standard on the whole, but there are still unquali- fied items. It is important to enhance the inspection and administration of secondary water supplies, so as to improve the quality and guarantee the safety of drinking water.