Campaigns of withdrawal of the underground waters have been done during the year 2013 to the level of the boring situated in the township of Abomey-Calavi, to control their quality. These withdrawals were the object of analysis according to the techniques of assessment of water quality described by Rodier (1978) and to the recommendations of the world organization of health (WHO). The physical and chemical analysis showed that 98.7% of the studied boring present some concentrations superior to the norms recommended by the WHO (1994) and by Benin (2011). The studied boring present without exception a bacteriological pollution. The very elevated microbial germ presence in water could constitute a sanitary risk importing for the inhabitants who consume the water of these boring.
Keywords: Bacteriological, Boring, Chemical., Physical, Quality, Underground Water
