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目的了解本地区集中式供水铝、铁、锰、铜、锌五种金属指标在本地饮用水水质中的风险程度,评估其对本地水质的影响。方法 2013—2015年在本市22个监测点随机抽取生活饮用水样本,采用国标方法对铝、铁、锰、铜、锌五个金属指标进行检测,使用多维灰聚类分析方法对水质进行风险评估。结果高风险样本占4.01%(46/1 147)、中风险样本占83.26%(955/1 147)、低风险样本占12.73%(146/1 147)。结论本地集中式供水水质铝、铁、锰、铜、锌五种金属指标处于中等风险水平。
Objective To understand the risk of local metal-iron, iron, manganese, copper, zinc in the drinking water quality of local drinking water supply in the region and evaluate its impact on local water quality. Methods Samples of drinking water were randomly sampled from 22 monitoring sites in the city from 2013 to 2015. Five metal indexes of aluminum, iron, manganese, copper and zinc were detected by national standard method. The results of multi-dimensional gray clustering analysis were used to assess the water quality Evaluation. Results High-risk samples accounted for 4.01% (46/1 147), medium-risk samples accounted for 83.26% (955/1 147) and low-risk samples accounted for 12.73% (146/1 147). Conclusion The local centralized water quality of aluminum, iron, manganese, copper, zinc five kinds of metal indicators at a medium level of risk.