Determination of Physicochemical Parameters and Mineral Compositions of Hand Dug Well Water Samples Collected from Selected Local Government Areas in Oyo State, Nigeria

Potable water is essential for human survival but contaminations through human activities have jeo

pardized it. This research will create awareness on the condition of hand dug well water used and reduce transmission of diseases in the study areas. The study deals with the determination of physic-chemical parameters and Mineral composition of water samples collected in the month of September, 2019 from hand dug well from selected local government areas in Oyo State Nigeria, (Ibadan North-East, Ibarapa Central, Afijio, Ogbomoso South and Iseyin local government). The parameters examined were Temperature (ToC), Potential Hydrogen (pH), Conductivity (µ/S-1/cm), Total Dissolved Solid (TDS ppm), Salinity (ppm), Dissolved Oxygen (DO mg/L),Potassium (K+), Calcium (Ca2+), Magnesium (Mg2+), Zinc (Zn2+) and Chloride (Cl-). Standard analytical methods were used. The analytical results of the study revealed that Temperatures are within 27 and 28oC, the pH of the samples ranges from 4.7-6.8, Conductivity falls between 785-1671 µ/S-1/cm. The TDS ranges from 550-1346 ppm, Salinity from 384-956 ppm while DO had the values ranges of 6.03-11.44 mg/l. Potassium (K+) (1.92-6.22 mg/l), Calcium (Ca2+) (14.74-18.52 mg/l), Magnesium (Mg2+) (6.34-7.81 mg/l), Zinc (Zn2+) (0.39-0.47mg/l) and Chloride (Cl-) (26.19-28.70 mg/l). It was noted that, Conductivity, salinity and DO were high compared to WHO and NSDWQ permissible standard limits. This indicated that pollution from dumpsites and erosion has great impact on the water. The mineral compositions of the water samples are within the permissible limit recommended by WHO. It is advisable that proper drainage and sewer systems should be constructed in all areas to ensure proper disposal of hazardous liquid waste, thereby preventing seepage into groundwater and surface water.