概述

每升水中含有的大肠杆菌群数.包括大肠杆菌（Ｅｃｏｌｉ）、产气肠杆菌（Ｅｎｔｅｒｏｂａｃｔｅｒａｅｒｏｇｅｎｅｓ）和介于以M上两种微生物之间的类群.正常情况下，水体中所含的病原微生物较少，检测较困难，通常利用大肠杆菌群作为污染指示菌，在水的细菌学检查方面具有重要意义.中国生活饮用水卫生标准规定，大肠杆菌指数不得大于３。Per liter in water containing the E. coli group number. Including E. coli (Ecoli), Enterobacter aerogenes (Enterobacteraerogenes), and ranged in M between the two kinds of microbial taxa. Under normal circumstances, the more pathogenic microorganisms contained in water less, detection more difficult, often used as a pollution indicator bacteria E. coli group, in the bacteriological examination of water has an important significance.China's drinking water health standards require that the E. coliindex of not more than three.