2009—2011年渭南市生活饮用水水质检测结果分析

Testing results on quality of drinking water in Weinan City from 2009-2011

目的了解渭南市生活饮用水卫生状况,探讨影响水质安全的主要因素,为相关部门制定改善措施提供科学依据。方法按照《生活饮用水标准检验方法》(GB/T 5750-2006)进行检验,按照《生活饮用水卫生标准》(GB/T 5749-2006)进行评价。结果 3年共检测生活饮用水618份,合格样品210份,合格率34.0%。所检项目中微生物指标合格率最低,仅为36.0%。2009—2011年水样合格率分别为26.6%、32.1%、42.8%,差异有统计学意义(χ2=12.28,P<0.01)。结论渭南市生活饮用水水质合格率较低,受微生物污染严重,必须加强对饮水水源的卫生防护,加强水质沉淀、净化和消毒处理,确保城镇居民饮水安全。

[ Objective] To understand the sanitary condition of drinking water in Weinan City, to explore the main factors affecting the water quality and safety, and provide the scientific basis for relevant departments to develop improvement measures. [ Methods ] Test was based on ＂Standard Test Methods for Drinking Water＂ （ GB/T 5750-2006 ） , and the results were evaluated according to ＂ Sanitary Standard for Drinking Water ＂ [ GB/T 5749-2006 }. [ Results] A total of 618 water samples were tested during 3 years, and 210 were qualified. The qualified rate was 34.0%. The qualified rate of microbiological index was lowest （36.0%）. The qualified rates from 2009-2011 were 26.6%, 32. 1% and 42. 8%, respectively, with significant difference （ X2 = 12.28, P 〈 0. 01 ）. [ Conclusion] The qualified rate of drinking water is low and microbial contamination is serious in Weinan City. It is necessary to strengthen the sanitary protection of drinking water sources, to enhance water precipitation , purification and disinfection, so as to ensure the safety of drinking water for the residents.