2010—2012年天津市西青区生活饮用水微生物检测结果

Results of microbiological detection of drinking water in Xiqing District of Tianjin from 2010-2012

目的了解西青区主要生活饮用水微生物污染状况,为提高饮用水卫生质量提供参考。方法按相关标准和检验方法对西青区2010—2012年末梢水、二次供水、桶装水3类生活饮用水进行检验和评价。结果 2010—2012年共检测生活饮用水681份,合格630份,合格率92.5%;其中447份末梢水合格率97.3%,145份二次供水合格率84.1%,89份桶装水合格率82.0%。3类生活饮用水合格率间的差异有统计学意义(χ2=43.70,P<0.01),二次供水委托送检样品合格率高于日常监测采样,合格率间的差异有统计学意义(χ2=5.29,P<0.05)。菌落总数占不合格数的94.1%。结论菌落总数是主要不合格指标,相关部门应加强监督监测力度,提高各类饮用水的质量,保证人民群众的饮水安全。

[ Objective ] To understand the microbial contamination status of drinking water in Xiqing District, provide the reference for improving the sanitary quality of drinking water. [ Methods ] According to the relevant standards and test methods, the tap water, secondary water supply and bottled water in Xiqing District from 2010-2012 were tested and evaluated. [ Results] A total of 681 drinking water samples were detected, and 630 were qualified, with the qualified rate of 92.5 %. The qualified rate of 447 tap wa-ter samples was 97.3%, the qualified rate of 145 samples of secondary water supply was 84.1%, and the qualified rate of 89 bot-tled water samples was 82. 0%. There was significant difference in the qualified rate among three types of drinking water （ X^2 =43.70, P 〈0.01 ）. In the samples of secondary water supply, the qualified rate of entrusted samples was higher than that of routine monitoring samples, and the difference was significant （ X^2 = 5.29, P 〈 0.05 ）. 94.1% of unqualified samples were caused by exceeding the standard of total bacterial count. [ Conclusion ] The main unqualified index is total bacterial count. The relevant departments should strengthen the supervision and monitoring, and improve the quality of all kinds of drinking water, to ensure the safety of the people＇ drinking water.