“4.11”自来水苯污染事件暴露了兰州市供水系统的安全隐患,本文分析了兰州市自来水供水系统存在的风险,并对新水源地的优势进行了分析与阐述,认为未来兰州市新水源地可以替代现有的地表水源地,现有的地表水源地可作为未来的第二水源。一、“4.11”自来水苯污染事件2014年4月11日,兰州自来水公司[全称兰州威利雅水务(集团)有限责任公司]检测出厂水苯含量高达118μg/L,后升高至约200μg/L,超出国家规定的饮用水苯含量最高标 Benzene contamination of tap water exposed the safety hazard of Lanzhou water supply system. This article analyzes the risk of tap water supply system in Lanzhou City, and analyzes the advantages of new water source. It is concluded that the future of Lanzhou New Water Source It can replace the existing surface water sources and the existing surface water sources can serve as the second source of water for the future. April 11, 2014, Lanzhou Water Company [full name of Lanzhou Willie Water (Group) Co., Ltd.] factory water benzene content as high as 118μg / L, then increased to about 200μg / L, exceeding the state’s highest benzene content of drinking water standards