On April 11, 2014 Lanzhou officials advised residents not to drink tap water, because benzene levels were 20 times the national limit of 10 micrograms per liter.
2014 年 4 月 11 日，兰州官员建议居民不要饮用水龙头水，因为其苯含量是国家标准每升 10 微克的 20 倍。