Water, a simple molecule which is essential for the life and development of the population. The distribution of this drinking water of good sanitary quality and the maintenance of the quality during its distribution is a permanent concern of REGIDESO (Water Distribution Authority). The quality aspect deserves special attention in terms of microbiological and physicochemical balance.The water from the Regideso; distributed in the town of Kolwezi to part of the population may have a poorer quality at the outlet of the tap compared to that produced in factories because of the dilapidated drinking water distribution network in the town.Thus our study will focus on the knowledge of the microbiological quality (mesophilic aerobic flora, total coliforms, Escherichia coli, salmonella and shigella, faecal streptococcus, clostridium perfringens) and physicochemical (pH, turbidity, residual chlorine, etc.) of the water, flowing from the Regideso tap. To do this, a research method and technique based on experimentation as well as documentation in order to compare the results obtained in the laboratory according to international standards for the quality of water intended for human consumption and carried out by the tests of 'guidelines for evaluating the final quality of water intended for human consumption. After the orientation tests focused on physico-chemical analyzes only. We carried out microbiological analyzes to identify pathogenic germs in the water of the factories as well as at the level of the distribution network for the proper assessment of the quality of the latter. After analysis, we found the following:- The physico-chemical analyzes of the water taken at the outlet of the treatment plants show values ​​below the limits of the standards published in 2011 by the WHO;- A deterioration in the quality of the water caused by the obsolescence (piping pierced in certain places and corrosion of the piping) of the distribution network at certain sampling points; this situation is observed in the MUNUNKA district located in the commune of MANIKA. The degradation influences the turbidity of the water drawn from the taps as well as the reduction in the concentration of the residual chlorine level (i.e. 12.40 NTU against the WHO standard: 0-5 NTU and 0.1 mg / l of Chlorine against the WHO standard: 0.2 - 1mg / l);- And finally, the microbiological analysis shows that there is an absence of all the pathogenic germs sought except in raw water which has an excess of aerobic mesophilic flora (ie 591 CFU / 100ml against the WHO standard: ˂ 100 ml). To maintain good water quality, REGIDESO will need substantial resources to rebuild its distribution network without forgetting the renewal of equipment.