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目的了解六安市城区生活饮用水卫生状况,为改进市政供水卫生质量和卫生监督工作提供科学依据。方法按国家标准对水样进行采集、检测和评价,对六安市城区2008~2012年生活饮用水进行抽样监测,共采集水样697份,分别对感官性状、一般化学指标、毒理学指标、微生物指标和消毒剂指标进行检测。结果六安市2008~2012年城区生活饮用水水质合格率分别为81.06%、88.64%、91.08%、93.45%、99.07%;主要不合格指标是浑浊度、硝酸盐氮、游离余氯、总大肠菌群、耐热大肠菌群等;丰水期与枯水期水质合格率差异无统计学意义(χ2=0.325,P>0.05);新水厂与老水厂水质合格率分别为95.90%和87.64%,差异有统计学意义(χ2=12.633,P<0.01)。结论六安市城区生活饮用水卫生状况趋于良好,但有部分指标超标,饮用水水质存在一定卫生安全隐患,应加强对供水单位的监督管理。
Objective To understand the sanitary status of drinking water in urban areas of Lu’an and to provide a scientific basis for improving the hygienic quality and health supervision of municipal water supply. Methods The sampling, monitoring and evaluation of water samples were carried out according to national standards. Samples of drinking water in urban areas of Lu’an from 2008 to 2012 were sampled and monitored. A total of 697 water samples were collected. The sensory traits, general chemical indexes, toxicological indexes, Microbial indicators and disinfectant indicators for testing. Results The passing rate of urban drinking water quality was 81.06%, 88.64%, 91.08%, 93.45% and 99.07% respectively in 2008 and 2012 in Lu’an city. The main unqualified indicators were turbidity, nitrate nitrogen, free residual chlorine and total large intestine (Χ2 = 0.325, P> 0.05). The qualified rates of water quality of Xinshui Factory and LaoWu Factory were 95.90% and 87.64%, respectively. The qualified rate of water quality in wet season and dry season was no significant difference , The difference was statistically significant (χ2 = 12.633, P <0.01). Conclusion The sanitary status of drinking water in urban areas of Lu’an City tends to be good, but some indicators exceed the standard. There is some health and safety hazard in the quality of drinking water, and the supervision and management of water supply units should be strengthened.