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目的了解芜湖市饮用水水质微生物污染状况,为饮用水的卫生管理提供基础资料。方法分析2005~2008年间各类饮用水水样的微生物指标检测结果。结果4年共采集饮用水样品811份,合格772份,总合格率为95.19%,各年度的合格率分别为97.62%、98.91%、91.58%、92.95%,各年度间合格率差异有统计学意义(χ2=16.18,P<0.01);在各类被检测的水质样品中,市政水厂末梢水合格率最高,为99.28%,其次为市政水厂出厂水,合格率为91.18%,自备水厂出厂水合格率最低,仅为76.09%;二次供水合格率为91.18%。地下蓄水池水与楼顶水箱水合格率间差异并无显著性(χ2=0.06,P>0.05)。结论芜湖市城市饮用水水质消毒效果总体很好,但自备水厂还需进一步加强水质消毒工作,规范管网检修工作。
Objective To understand the status of microbial contamination of drinking water in Wuhu City and provide basic information for the sanitary management of drinking water. Methods The results of microbiological tests on various drinking water samples from 2005 to 2008 were analyzed. Results A total of 811 drinking water samples were collected during the four years, with a total of 772 passes, with a total pass rate of 95.19%. The pass rates in each year were 97.62%, 98.91%, 91.58% and 92.95% respectively. There was a statistically significant difference in pass rates between the years (Χ2 = 16.18, P <0.01). Among the tested water quality samples, the qualified rate of peripheral water in municipal waterworks was the highest (99.28%), followed by that of municipal waterworks, with a pass rate of 91.18% The lowest rate of factory water factory water, only 76.09%; secondary water supply pass rate was 91.18%. There was no significant difference between the water passing rates of underground water storage tank and roof water tank (χ2 = 0.06, P> 0.05). Conclusion The drinking water quality of Wuhu City, overall disinfection effect is good, but the self-owned water plant needs to be further strengthened disinfection of water quality, standardize pipe network overhaul.