2011-2013年张家口市宣化区二次供水水质检测结果分析

Secondary water supply quality analysis in Xuanhua District of Zhangjiakou city during 2011-2013

目的了解张家口市宣化区二次供水水质卫生状况,为加强二次供水卫生管理提供科学依据。方法根据《生活饮用水卫生标准》(GB 5749-2006)对2011-2013年辖区内二次供水的检测结果进行评价分析。结果 2011-2013年共检测二次供水水样183份,合格167份,合格率为92.3%。各年度二次供水合格率分别为87.5%、91.9%、93.8%,差异无统计学意义(P>0.05)。所检项目中,不合格的主要为余氯、菌落总数、总大肠菌群,差异有统计学意义(P<0.005)。结论张家口市宣化区二次供水合格率较高,但仍存在污染风险,应继续加强卫生监督管理,提高二次供水的卫生质量。

Objective To understand the quality of secondary water supply in Xuanhua district,to provide scientific data for carrying out effective health supervision in future. Methods According to Hygienic standard for drinking water（ GB5749-2006）,the test results of secondary water supply in this area from 2011 to 2013 were analyzed and evaluated. Results A total of 183 water samples were detected,167 samples qualified,the average pass rate was 92. 3 %. The pass rate was 87. 5% in 2011,91. 9% in 2012,and 93. 8% in 2013,respectively,there was no statistic difference（ P〉0. 05）. The unqualified items were mainly residual chlorine,the total number of colonies and coli forms,there were significant differences（ P〈0. 005）. Conclusions The qualified rate of secondary water supply was high in Xuanhua district of Zhangjiakou city,but hygiene supervision need to be further strengthened,in order to improve the quality of secondary supply water.