Evaluation of coliforms by MPN method as an indicator of water quality of Ain Ziana Lake.

Abstract

This study aimed to reveal the extent of bacterial contamination in the water of the Libyan Ain Ziana Lake, located northeast of the city of Benghazi. Water samples were collected from four areas in the lake.Fecaland environmental contamination was revealed by microbial investigation, which showed coliform bacteria to be present in all four water bodies. The results for bacteriological analysis showed that the average number of coliform bacteria / 100 mlwas183 75.93and for number of fecal coliform bacteria/100 ml was 58.2524.07 and microbial number per colony forming unit in 1 ml was 1025 CFU/ 1mlso all the sample exceeds the acceptable limit.