The objective of this study was to determine the level of arsenic in the environment and in foods consumed
around Kisumu, and compare these levels with the recommended WHO maximum limits. Arsenic was determined in
water samples from Lake Victoria, River Nyamasaria, tap water as well as in the soil samples. It was also determined in
staple foods including maize, beans, fish and vegetables. Arsenic content in the samples was determined using Atomic
Absorption Spectrophotometry. The results showed that arsenic content in the water and soil ranged from 0.00 to 8.30
ng/100 ml and 12.39 to 24.36 μg/100 g, respectively, and the mean arsenic levels in all water and soil samples were within
the safe WHO limits for arsenic. The arsenic content in the maize and bean samples ranged from 5.21 to 7.03 μg/100 g.
The arsenic content in the vegetables and fish ranged from 2.89 to 7.34 and 4.31 to 7.66 μg/100 g, respectively. The arsenic
content in all the food samples were also within the safe WHO arsenic limits. However, there were variations in arsenic
contents between the species of fish studied. The arsenic content was significantly higher in soil samples in comparison
to water samples (p<0.05). Overall the arsenic levels in all the food, water and soil samples were within the maximum
WHO safe limits. It is recommended that continuous monitoring of arsenic levels of water, soil and foods be put in place
since there could be seasonal variations in their levels.