**3.4 Total dissolved solids (TDS)**

These are the inorganic matters and small amounts of organic matter, which are present as solution in water. The study found TDS values from the drinking water samples are all within the maximum limit of 1000 mg/L. The highest TDS values of 637 mg/L and the lowest TDS values of 6 mg/L correspond to samples from KL1 and TA3, respectively. The highest TDS values were recorded from site MD3 (630) and TA3 (637). This is higher than the range of 37.67 mg/L to 476.67 mg/L reported by Moses and Ishaku [21] in the evaluation of physicochemical properties of well water qualities in selected villages in Zing Local Government Area of Taraba State, Nigeria. The standard or allowable value of the TDS set by WHO is 1000 mg/L. Therefore, the TDS values obtained in this study are within the WHO permissible standards.
