上海市杨浦区居住小区管道直饮水卫生现况调查
Sanitation Status of Direct-drinking Water Pipeline System in Residential Area of Yangpu District, Shanghai
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摘要:
目的 了解杨浦区居住小区管道直饮水卫生现况,为加强直饮水卫生管理,保障居民饮水安全提供依据。 方法 2008年对该区9个管道直饮水供水小区开展问卷调查,并抽样采集原水、成品水、回流水和管网水进行检测。 结论 9个管道直饮水小区中6个制水间在地下室,水质消毒以臭氧为主,开展水质自检频率为2~4次/月,日常维护人员1~2人。水质检测结果显示管道直饮水的浑浊度、pH值、总硬度等指标与自来水相比,明显下降(P<0.05);部分管网水和回流水样本的菌落总数检测呈阳性(3~42 CFU/mL)。 结论 管道直饮水水质明显好于自来水,但供水小区卫生管理制度、日常维护及消毒措施存在不足,容易产生二次污染。 Abstract:Objective To explore the sanitary conditions of direct-drinking water pipeline system in residential area of Yangpu District. In order to strengthen the management of direct-drinking water, provide the basis for protection of drinking safety. Methods Questionnaire survey was conducted on the residents using direct-drinking water pipeline system in 9 residential areas in 2008. Source water, finished water, backflow of water and piped water from these residential areas were sampled to assess water quality. Results In the 9 assessed redisent areas, water-making apparatuses of six residential areas were in the basements. Ozone was used to disinfect the direct-drinking water in all apparatuses. Water quality was monitored by themselves two to four times every month. One or two persons were in charge of daily maintenance. Water quality test of direct-drinking water showed that the value of the indices, such as turbidity, pH value, total hardness and so on, were much lower than those of tap water (P<0.05). Total number of bacteria in part of piped water and backflow of water was positive (3-42 CFU/mL). Conclusion The quality of direct-drinking water is better than that of tap water, but sanitation management system, daily maintenance and disinfection measures have limitations, which are easy to cause secondary pollution.
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