一起水源苯酚污染引起饮用水异味事件的调查

An Investigation on Odor in Drinking Water by Source Water Pollution with Phenol

[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 cause of an incident of drinking water odor in a city, to identify the pollutants, and to ensure drinking water safety and customer health by identifying and removing the pollutant. [ Methods ] A field investigation was conducted in a water plant after the drinking water odor incident reported. The samples of source water, finished water and peripheral water were monitored and evaluated. [ Results ] The volatile phenol index of source water did not meet the class III water quality standard prescribed in Environmental Quality Standards for Surface Water （GB 3838--2002）. The concentrations of volatile phenols tested in finished water and peripheral water samples varied between 0.002 mg/L and 0.132 mg/L, and other indicators such as smell and taste did not conform to the requirements of Standards for DrinMng Water Quality （GB 5749-2006）. [ Conclusion ] Phenol pollution of source water is the main cause of the investigated odor incident in drinkin~ water.