Abstract:
Metal contamination in water is a major determinant of water quality. People who consume this
water suffer from water borne diseases. There are various natural and anthropological activities
at the sample collection site leading to increase in concentration of trace elements in drinking
water. Activities like corrosion of metal coated pipes, herbicides, insecticides, ceramic wastes,
taking gravel from near water source, etc. may lead to pollution of drinking water by heavy
metals like chromium. The objective of this study was to detect metal concentration in spring and
tap water from selected residential areas in the Gelemso town. Tap water samples were collected
from three different locations during the rainy season. Samples were analysed using atomic
absorption spectrometry to determine the concentration of lead, chromium and copper. The
results obtained were compared with guidelines for drinking water quality such as the World
Health Organization (WHO) guidelines. The mean concentrations of heavy metals were 0.137mg
for Pb and BDL for Cr and Cu. The mean pH value was 7.4 and the mean electrical conductivity
value 0.319mS.In general, the result of the present study have shown that the concentration of
lead metal has shown values higher than the WHO recommended maximum admissible limits.
This is an indication of pollution hazards and weak drinking water treatment practices. This
study, therefore, recommends the government and other responsible authorities to take
appropriate corrective measures.