Quality parameters of well and borehole water from flooded and non-flooded areas were determined by a combination of instrumental and classical methods and compared. With boreholes, the conductivity, total dissolved solid (TDS), alkalinity, chloride and zinc levels in the flooded part were statistically comparable to their corresponding values in the non-flooded part. With wells, chloride (106.2 mg/L), alkalinity (72.6 mg/L), hardness (118.6 mg/L), conductivity (952.3 ), TDS (577.0 mg/L), pH (7.21), total an.d fecal coliform counts (236.6 MPN/100mL and 11.0 MPN/100mL respectively) in water from the flooded parts were higher than their corresponding values in the non-flooded part (70.33 mg/L, 63.3 mg/L, 75.6 mg/L, 946.3 , 576.0 mg/L, 7.15, 8.6 MPN/100mL and fecal coliform not-detected respectively). Contamination with harmful coliforms was found to be the most negative effect of flooding on ground water from wells as most of the quality parameters assessed were within permissible limits in drinking water except for total and faecal coliform counts.
Keywords: Borehole Water, Ground water quality, flooded areas, non-flooded areas, well water
