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Table 2

Risk assessment of borehole water quality

WardVillageBoreholeMicrobiological water quality
Physical water quality
Total coliform
MPN/100 ml
(*colour coding)
E. coli
MPN/100 ml
(*colour coding)
Temp
(°C)
Electrical conductivity (μS/m)pH
15 Mavambe Borehole 1 <1 (Blue) <1 (Blue) 21 87.2 8.76 
Borehole 2 <1 (Blue) <1 (Blue) 21 87.2 8.76 
Borehole 3 <1 (Blue) <1 (Blue) 23 86.0 8.65 
18 Mulenzhe Borehole 4 <1 (Blue) <1 (Blue) 20 136.4 7.64 
Borehole 5 >2419.6 (Purple) <1 (Blue) 20 720 7.64 
Dididi Borehole 6 5.2 (Green) 2.0 (Red) 16 1092 8.09 
Doveni Borehole 7 >2419.6 (Purple) 1.0 (Red) 20 865 7.89 
Borehole 8 >2419.6 (Purple) 2.0 (Red) 21 865 7.85 
Phaphazela Borehole 9 21.6 (Yellow) <1 (Blue) 20 941 7.92 
19 Makhuvha A Borehole 10 9.7 (Green) <1 (Blue) 21 793 8.89 
Borehole 11 14.8 (Yellow) 6.3 (Red) 20 798 8.03 
Budeli Borehole 12 <1 (Blue) <1 (Blue) 20 92.8 8.70 
WardVillageBoreholeMicrobiological water quality
Physical water quality
Total coliform
MPN/100 ml
(*colour coding)
E. coli
MPN/100 ml
(*colour coding)
Temp
(°C)
Electrical conductivity (μS/m)pH
15 Mavambe Borehole 1 <1 (Blue) <1 (Blue) 21 87.2 8.76 
Borehole 2 <1 (Blue) <1 (Blue) 21 87.2 8.76 
Borehole 3 <1 (Blue) <1 (Blue) 23 86.0 8.65 
18 Mulenzhe Borehole 4 <1 (Blue) <1 (Blue) 20 136.4 7.64 
Borehole 5 >2419.6 (Purple) <1 (Blue) 20 720 7.64 
Dididi Borehole 6 5.2 (Green) 2.0 (Red) 16 1092 8.09 
Doveni Borehole 7 >2419.6 (Purple) 1.0 (Red) 20 865 7.89 
Borehole 8 >2419.6 (Purple) 2.0 (Red) 21 865 7.85 
Phaphazela Borehole 9 21.6 (Yellow) <1 (Blue) 20 941 7.92 
19 Makhuvha A Borehole 10 9.7 (Green) <1 (Blue) 21 793 8.89 
Borehole 11 14.8 (Yellow) 6.3 (Red) 20 798 8.03 
Budeli Borehole 12 <1 (Blue) <1 (Blue) 20 92.8 8.70 

*Colour coding:

Blue (Class 0) - ideal water.

Green (Class I) – good water.

Yellow (Class II) – marginal water.

Red (Class III) – poor water.

Purple (Class IV) – completely unacceptable/unsafe.

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