深圳经济特区国家城市饮用水监测网络水质分析

Analysis for water quality of the product water from the centralized water supply system in Shenzhen Special Economic Zone

目的了解深圳特区城市生活饮用水出厂水水质卫生状况。方法选取深圳特区内10家市政水厂,于2008-2009年丰水期和枯水期分别采集市政供水水厂出厂水水样40份。水样的采集和检验按照GB/T5750.2-2006《生活饮用水标准检验方法——水样的采集与保存》进行,检测结果按照GB5749-2006《生活饮用水卫生标准》进行评价。结果出厂水水样合格率为85.0%(34/40)。在检测的66项指标中,部分水厂出厂水存在浑浊度、铝、三卤甲烷和二氧化氯不合格情况。经Spearman相关分析,铝与浑浊度呈正相关(r=0.518,P<0.01)。结论深圳市集中式供水出厂水水质良好。

Objective To explore the water quality of the product water from the centralized water supply system in Shenzhen Special Economic Zone.Methods The sanitary quality of the product water samples collected from 10 centralized water supply system in cites were determined and evaluated according to the Standards for drinking water quality（GB5749-2006） in wet season and dry season of 2008 and 2009.The water-collection and preservation of water samples was according to Standard examination methods for drinking water-collection and preservation of water samples（GB/T5750.2-2006）.Results The average qualification rate of drinking water was 85.0%（34/40） in Shenzhen.Among 66 quality of indexes,4 indexes（turbidity,aluminum,trihalomethanes,chlorine dioxide） exceeded the standard limits in degrees in some centralized water supply system.Through Spearman correlation analysis,the aluminum was positively correlated with turbidity（r=0.518,P0.01）.Conclusions The content of some substance in the product water from some centralized water supply system exceeded the related standard limits in Shenzhen.