TABLE 4
COLIPHAGE QUALITY OF THE WATER SAMPLES ANALYSED
Limit for no risk* E. coli strain A B C D E
0 -1 pfu/100 ml WG4 (pfu/ml) Minimum 0 0 0 0 9.3
X 0 0 0 0 32.0
SD 0 0 0 0 17.9
Maximum 0 0 0 0 54
0-1 pfu/100 ml K12 (pfu/ml) Minimum 0 0 0 0 4.5
X 0 0 0 0 10.5
SD 0 0 0 0 6
Maximum 0 0 0 0 16.5
A: Tlhaloganyo groundwater B: Rainwater C: Matlaisane groundwater D: Lefatlheng Well water E: Tshwane
River water X: Mean SD: Standard deviation * DWAF, 1996