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[目的]调查分析某城市生活饮用水异味事件的发生原因,查明污染物质,以利采取有效措施消除或控制危害因素,确保生活饮用水卫生安全,保障消费者身体健康。[方法]对某自来水厂进行现场调查和水源水、出厂水、末梢水水质进行卫生监测与评价。[结果]水源水水质的挥发酚类不符合国家《地面水环境质量标准》(GB3838—2002)规定的III类水质标准;出厂水和末梢水水样中的挥发酚类检测值为<0.002~0.132mg/L,存在臭和味、挥发酚类等指标不符合国家《生活饮用水卫生标准》(GB5749—2006)规定要求。[结论]水源水苯酚污染是造成此次饮用水异味事件的主要原因。
[Objective] To investigate and analyze the causes of the odor of drinking water in a city, identify the pollutants so as to take effective measures to eliminate or control the harmful factors, ensure the sanitary safety of drinking water and ensure the health of consumers. [Method] On-site investigation of a water plant and hygienic monitoring and evaluation of water quality, ex-factory water and peripheral water quality were carried out. [Result] The volatile phenols of water quality did not meet the water quality standard of Class III of the National “Surface Water Environmental Quality Standard” (GB3838-2002). The detected values of volatile phenols in water samples of factory water and peripheral water were <0.002 ~ 0.132mg / L, the presence of odor and smell, volatile phenol and other indicators do not meet the national “drinking water health standards” (GB5749-2006) requirements. [Conclusion] Phenol pollution of water source water was the main reason of this odor of drinking water.