Analytical results of 23 water samples from surface water and groundwater reveal
that the surface water is contaminated by nitrate. The mean concentration of
nitrate from the surface water samples is 106 mg/l. The results further reveal that
the different water sources are contaminated with respect to phosphate and
coliform bacteria. Phosphate concentrations reveal a mean value of 19.6 mg/l in
the surface water and a mean value of 13 mg/l in the groundwater samples.
Coliform reveal an average of 9 in the surface water and an average of 25 number
counts in the groundwater samples. The major fault zone in the area is responsible
for the contaminant migration. Correlation between the chemical parameters
reveal strong to perfect correlation, moderate and weak correlation. The
correlation between coliform and chemical parameters indicates negative
correlation. Principal component analysis on the chemical parameters reveals three factors (1, 2 and 3) that account for about 76.04% of the total variance. The
plotting of the factor loadings reveals that natural mineralization, denitrification
and sulphate reduction are the major processes responsible for the modification of
the groundwater chemistry in the area.