Surveillance of drinking water is a necessary action intended to
prevent the general public from contaminating water borne diseases.
In this study, arsenic concentrations in 22 borehole water samples
from various locations in the Wassa West district have been studied
using Instrumental Neutron Activation Analysis. The samples were
irradiated using a 30 kW tank-in-pool Ghana Research Reactor-1
operating at a thermal neutron flux of 5 x 10 n s 1 cm-2. Elevated
levels of arsenic were found in virtually all the 22 samples.
Arsenic concentration in the samples ranged from 0.06 ppm to 9.43
ppm. (Mean-2.23, Standard Error of Mean-0.57) These values far
exceed the World Health Organization's recommended value of 0.01
ppm for arsenic in drinking water. The occurrence of arsenic in the
area is traced to the existence of sulphide minerals such as
arsenopyrites (FeAsS2) present in the underlying Birimian Basement
rocks in the area.
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