The focus of this study was to assess the suitability of groundwater for drinking and irrigation uses in Dodoma Municipality. Hydrochemical investigations was conducted in Dodoma urban where twenty water samples were collected from boreholes/wells to monitor physico-chemical quality. Groundwater samples were measured for pH, Chloride, Nitrate, Electric Conductivity, Total Dissolved Solids and Temperature in situ while major ions (Na+, Ca2+, K+, Mg2+, NO3-, Cl, SO42- and HCO3-) were analyzed in the laboratory. It was found that the physico-chemical properties of the groundwater varies from fresh to brackish and it is slightly acidic to alkaline. The Na+ and Mg2+ were dominant cations while Cl and HCO3− were dominant anions. Furthermore, the results show that for most groundwater quality parameters in Dodoma Municipality are suitable for drinking and irrigation uses. As for Chloride, the average concentration of about 1568.21mg/l seems to be unpalatable for drinking. However, for the Chloride which was found at a range of 710-960mg/l in few boreholes can be used for grapes irrigation, the main crop in the area, and 180-600 mg/l that was found in only one borehole is suitable for stone fruits irrigation. The Nitrate concentration complies with the Tanzania Bureau of Standards (TBS) and the World Health Organisation (WHO) limits for drinking purposes since its concentration was below 50 mg/l. Several groundwater management strategies and recommendations were proposed to control the quality of the groundwater and to get rid of groundwater problems. Furthermore, the study recommends frequent groundwater quality monitoring and integration of groundwater into the water resources management for the benefit of all of Dodoma Municipal people.

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