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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 status of microbial contamination of main drinking water in Xiqing District and provide references for improving the hygienic quality of drinking water. Methods According to the relevant standards and test methods, three types of domestic drinking water were tested and evaluated for the peripheral water, secondary water supply and barreled water from 2010 to 2012 in Xiqing District. Results A total of 681 domestic drinking water were tested during the period from 2010 to 2012, with a pass rate of 630.5 and a pass rate of 92.5%. Out of the 447 cases, the passing rate of peripheral water was 97.3%, the rate of 145 secondary water supply was 84.1% and that of 89 bottled water was 82.0 %. There was significant difference between the three types of drinking water qualification rates (χ2 = 43.70, P <0.01). The qualified rate of entrusted samples submitted by secondary water supply was higher than that of routine monitoring sampling, the difference was statistically significant (χ2 = = 5.29, P <0.05). The total number of colonies accounted for 94.1% of the number of unqualified. Conclusion The total number of colonies is the main failure criteria, the relevant departments should strengthen supervision and monitoring efforts to improve the quality of various types of drinking water to ensure that people of drinking water safety.