Water is an essential element for the functioning of health facilities, but it can be a source of serious infections in case of contamination, especially for the most vulnerable patients. The main health risks associated with the use of water in health facilities must be identified and evaluated to determine how to implement and control these risks. This is a prospective and transversal study over a period of three months (March, April, May, 2013) in the bacteriology laboratory of the IBN SINA Hospital in Rabat, which aims for bacteriological analysis of four types of water collected in the services in our study. Of 98 water samples analyzed, 40 were non-compliant (either 40.81%), including 22/38 (57.89%) drinking water, 14/38 (36.84%) water for standard care, 2/13 (15.38%) water bacteriologically mastered, 3/9 (33.3%) water for hemodialysis. In case of abnormal results, effective corrective action must be implemented to improve water quality and protect the most fragile patients.