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目的了解深圳市生活饮用水水质的卫生状况。方法选取该市特区内全部市政供水水厂和宝安区、龙岗区主要的市政供水水厂共35家,于2008年5月采集市政供水水厂出厂水水样。水样的采集和检验按照GB/T5750—2006《生活饮用水标准检验方法》进行。检测结果按照GB5749—2006《生活饮用水卫生标准》进行评价。结果市政供水出厂水水样合格率为82.9%(29/35)。在检测的106项指标中,部分水厂出厂水存在浑浊度、铝、锰和余氯不合格情况。经Spearman相关分析,铝与浑浊度呈正相关,差异有统计学意义(r=0.417,P<0.05);菌落总数与游离余氯含量呈负相关,差异有统计学意义(r=-0.481,P<0.05)。结论深圳市市政供水出厂水水质良好。
Objective To understand the hygienic condition of drinking water quality in Shenzhen. Methods A total of 35 major municipal water supply plants were selected from all the municipal water supply plants in the special economic zone of the city and the main municipal water supply plants in Bao’an District and Longgang District. In May 2008, the municipal water samples were collected from municipal water supply plants. Water samples collected and tested in accordance with GB / T5750-2006 “drinking water standard test method”. Test results in accordance with GB5749-2006 “drinking water health standards” for evaluation. Results The municipal water supply factory water sample pass rate was 82.9% (29/35). Of the 106 indicators tested, turbidity, aluminum, manganese and residual chlorine in some of the factory’s water samples were found to be unqualified. The Spearman correlation analysis showed that there was a positive correlation between aluminum and turbidity (r = 0.417, P <0.05). There was a negative correlation between the total number of colonies and free residual chlorine (r = -0.481, P <0.05). Conclusion Shenzhen municipal water supply factory water quality is good.