Enterococcus is a genus of Gram positive, facultative anaerobic, a lactic acid bacterium that is commonly used as an indicator of water quality and sewage contamination. Enterococcus counts are useful as a water quality indicator due to their abundance in human sewage, correlation with many human pathogens and low abundance in sewage free environments (Jin et al. 2004). The EPA reports Enterococcus counts as colonies (or cells) per 100 ml of water.