RESUMEObjectif : L'objectif de cette étude est de contribuer à une amélioration de la qualité de l'eau des populations dans la Commune de Toffo. The objective of this study is to contribute to improving the water quality of the people in the Municipality of Toffo. Methods and Results:The methodology is based on data collection, data processing and analysis of results that is made using the PEIR. From the water sample taken samples, at a (01) modern wells, one (01) a borehole and (01) river, where Bacteriological and Physico-chemical analyzes were performed. Analysis of water samples provided the parameters (color: well = 8; river = 19 and PH: Well = 5.6; Bore hole = 6.0) which Journal of Applied Biosciences