The study was to know the water enterobacteria likely to harm the health of people in the group of Irhambi. Bacteriological analyzes of water sources, streams and rivers have been made. The results of the study show that the water sources, streams and rivers run through inhabited areas and bacteriological analysis shows that the water is contaminated, while the population obtains this water for drinking Gram Negative Bacilli and Unidentified (BGNNI), Kligler and Escherichia coli are present in some sources, streams and rivers of the search sites in the group of Irhambi. Thus, the Arab latrine pit is in the vicinity of sources of water. Animal faeces, dung and waste (rest of the kitchen, crop tops, etc.), used as fertilizer by farmers are at the base of groundwater contamination in runoff and infiltration of water rain hence the pollution of the water. The population and the landscape assainisse the environment of water points, and respects the minium distance of 25m between wells and latrines and the development partners keep telling support the strengthening of the remediation work at the households and financially support activities against pollution of water in the grouping. That governmental authorities, by encouraging health education awareness campaigns on the media and make continuous monitoring of water consumption in said group.