Famara Seydi Ba^1,, Diadioly Gassama¹, Alioune Ly², Baba Ngom², Séni Tamba²

Water provides all living beings with good health and the well-being of their organism. It allows him to meet his basic needs and especially his food. But, for a beneficial use, the optimal quality of the water is essential. In Senegal, most regions are fed by Lake Guiers and the latter is threatened by industrial discharges, hydro-agricultural activities which cause a gradual deterioration in its quality. In this study, we carried out bacteriological studies and a follow-up of the evolution of the lead content on the Keur Momar SARR-Thiès axis in order to see the degree of potability of the water intended for human consumption of Keur Momar Sarr to the storage reservoir of the Polytechnic School of Thiès. The microbiological parameters were determined by the colony-forming unit (CFU) method on selective agar media. The results of the physico-chemical parameters show that the concentration of lead is not significant with a maximum value of 0.11 mg/L. This value does not exceed the limits of the World Health Organization (WHO). The results of the bacteriological parameters show that the Kelle 1 and Beud forage boreholes contain the highest levels of total coliforms (110 and 115 CFU/100 mL) and faecal coliforms (34 and 85 CFU/100 mL). Faecal streptococci predominate in the borehole area (50 CFU/100 mL). A comparison with the WHO standards, these bacteriological parameters belong to the tolerance interval for water intended for consumption.

potability, bacteriological, content, lead, microorganisms