Vol. 3, Issue 5 (2018)
Assessment of the quality of water from hand dug wells at Dutsin Tanshi Bauchi, Bauchi State, Nigeria
Author(s): NS Gin, DS Buteh, S Daniel, A Sarkin Noma, H Akanang, YG Ranga
Abstract: This study focused upon the determination of physicochemical and microbial properties, including metals, selected anions and coliform bacteria in drinking water samples from Hand-dug wells in Dutsin Tanshi Bauchi Local Government Area of Bauchi State, Nigeria. Water samples collected from sixteen (16) different wells at Strategic positions and determined to ascertain how safe the water is for human consumption without treatment. Twenty one (21) relevant parameters on the test of water quality were taken into consideration. The physical and Chemical parameters assessed include temperature, conductivity, and total dissolved solid (T.D.S.). turbidity, pH, color, Total hardness, total alkalinity, calcium, magnesium potassium, sodium, copper, chromium, manganese, nitrate, sulphate, chloride and bicarbonate, while microbial parameters include total coliform and faecal coliform. The data showed variation the investigated parameters in samples as follows: Temperature 26.11-26 oC, Conductivity 40-2670us/cm, T.D.S. 200-1340mg/L, Turbidity 0.3-9.69 NTU, pH 6.7-7.9, Colour 1-71, Total Hardness as CaCO3 155-385 mg/L, Total Alkalinity as CaCO3 20-163mg/L, Ca2+ 32-128mg/L, K+ 1.3-88mg/L, Mg2+4.88-48.63mg/L, Na+17.68-173.85mg/L, Cu2+0.01-0.95mg/L, Cr3+0.00-0.05mg/L, Zn2+ 0-0.04 NO32-14.72-225.28mg/L, SO42-5-96mg/L, Cl-23.04-236.8mg/L, HCO3-24.4-201.3mg/L, Total coliform 0.0-890 cfu/100ml, Faecal coliforms 0.0-366cfu/100ml. The results revealed high variation between the WHO, NIS and NAFDAC standards for portable water and the obtained values. The implication is that water from most wells in the study area is not suitable for direct human consumption. The closeness of wells to refuse dumpsite was blamed for increased levels of concentration of pollutants. To avoid further pollution of ground water, the study therefore recommends that the site for wells should be at least 30m away from the source of contamination especially refuse dumpsite, the surrounding environment should be kept clean and tidy to avoid or reduce contaminations, disinfection of wells by chlorine and continuous monitoring to determine any Change in the level of pollution at sources.