Abstract

DE SOUSA, Cristina; COLMENARES, María Cristina  and  CORREIA, Angelina. Bacteriological contamination of the drinking water distribution systems: revision of control strategies. Bol Mal Salud Amb [online]. 2008, vol.48, n.1, pp.17-26. ISSN 1690-4648.

The purpose of this investigation was an analysis of the strategies employed to control bacteriological contamination, based on the factors that affect the deterioration of the drinking water distribution systems, as well as their influence on the quality of the water supplied to the consummers. The distribution system is of vital importance to establish the final quality of the water and the biofilms that form on the tube walls are the cause of their deterioration. The grouping of different microorganisms in colonies is considered a defense mechanism; these colonies benefit from the nutrients and develop resistance to disinfectants. The conclusion and the recommendation is that a maintenance program covering the complete system, including the storage tanks, must be established as a strategy for controlling bacteriological contamination. It is also necessary to control corrosion and the level of nutrients and to perform adequate disinfection procedures; these measures must be applied by constantly trained personnel.

Keywords : Distribution network; potable water; bacteriological contamination.