Table 3: Mean Salmonella (cfu/100 ml) after solar disinfection in Nakuru North Sub-County from January to December 2013.

Set A Time (Hrs) Set B Time (Hrs) Set C Time (Hrs)
Mean cfu/100ml x105 Mean cfu/100ml x105 Mean cfu/ 100ml x 105
1.6 0 2.9 0 3.3 0
2.2 1 4.4 1 3.6 1
1.8 2 3.5 2 3.0 2
0.9 3 1.5 3 2.8 3
0.5 4 1.4 4 3.5 4
0.0 5 0.0 5 4.1 5

Cfu, colony forming unit; Set A, infected water from the water sources; B, water inoculated with commercial Salmonella and C, contaminated water from water sources which was kept in the dark.