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Table 4

Significant Spearman's correlation coefficient (r) between enteric bacteria and the physicochemical characteristics of water from the borehole (p = 0.5)

Temp. (°C)pHEC (μS/cm)TDS (mg/l)DO (mg/l)Sal. (ppt)Turb. (NTU)
E. coli −0.21 0.18 0.18 0.15 −0.14 − 0.53 0.10 
Faecal coliforms −0.26 0.05 0.34 0.12 0.34 0.21 0.01 
Salmonella 0.51 0.50 0.40 0.50 −0.15 −0.09 − 0.50 
Shigella 0.05 −0.03 0.56 0.50 0.13 0.41 0.01 
Bifidobacterium 0.22 0.50 −0.12 0.06 −0.16 − 0.60 0.80 
Campylobacter 0.18 0.33 0.05 0.12 −0.08 −0.37 0.68 
Clostridium −0.25 0.41 0.67 − 0.50 − 0.54 −0.38 0.30 
Temp. (°C)pHEC (μS/cm)TDS (mg/l)DO (mg/l)Sal. (ppt)Turb. (NTU)
E. coli −0.21 0.18 0.18 0.15 −0.14 − 0.53 0.10 
Faecal coliforms −0.26 0.05 0.34 0.12 0.34 0.21 0.01 
Salmonella 0.51 0.50 0.40 0.50 −0.15 −0.09 − 0.50 
Shigella 0.05 −0.03 0.56 0.50 0.13 0.41 0.01 
Bifidobacterium 0.22 0.50 −0.12 0.06 −0.16 − 0.60 0.80 
Campylobacter 0.18 0.33 0.05 0.12 −0.08 −0.37 0.68 
Clostridium −0.25 0.41 0.67 − 0.50 − 0.54 −0.38 0.30 

Notes: Values in bold figures indicate significant correlation.

Temp., temperature; EC, electrical conductivity; TDS, total dissolved solids; DO, dissolved oxygen; Sal., salinity; Turb., turbidity; n = 24.

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