饮用水中常见的挥发性有机物通常包括苯、甲苯、乙苯、邻二甲苯、间二甲苯、对二甲苯、异丙苯、氯苯、苯乙烯等。除了苯是已知的致癌物以外,其他几种化合物对人体和水生生物均有不同程度的毒性。苯系物在我国大部分水系均有检出,其中甲苯、乙苯的检出频率高达70%。2007年7月实施的《生活饮用水卫生标准》(GB 5749—2006)将原来毒理指标中 Commonly used volatile organic compounds in drinking water usually include benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene, chlorobenzene, styrene and the like. In addition to benzene is a known carcinogen, several other compounds on the human body and aquatic organisms have varying degrees of toxicity. Benzene series are detected in most of China’s water system, of which toluene, ethylbenzene detection frequency of up to 70%. July 2007 implementation of the “drinking water health standards” (GB 5749-2006) will be the original toxicological indicators