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Table 3

The distribution of the samples with regard to average microorganism count

ParametersBottled water mean ± SD (min–max)Tap water mean ± SD (min–max)Filtered water mean ± SD (min–max)p
Escherichia coli 0.64 ± 4.24 (0–30) 18.7 ± 89.5 (0–500) 0.48 ± 1.89 (0–9) 0.131 
Coliform bacteria 0.64 ± 4.24 (0–30) 26.5 ± 128.9 (0–700) 0.46 ± 1.89 (0–9) 0.136 
Pseudomonas aeruginosa 1.2 ± 5.2 (0–30) 1.7 ± 7.5 (0–50) 0.231 
Clostridium perfringens 1.54 ± 9.92 (0–70) 0.303 
22 °C CFU 30.7 ± 96.74 (0–600) 28.0 ± 86.6 (0–400) 42.4 ± 158.9 (0–1,000) 0.811 
37 °C CFU 40.3 ± 154.5 (0–1,000) 26.2 ± 104.5 (0–500) 52.7 ± 167.4 (0–1,000) 0.659 
ParametersBottled water mean ± SD (min–max)Tap water mean ± SD (min–max)Filtered water mean ± SD (min–max)p
Escherichia coli 0.64 ± 4.24 (0–30) 18.7 ± 89.5 (0–500) 0.48 ± 1.89 (0–9) 0.131 
Coliform bacteria 0.64 ± 4.24 (0–30) 26.5 ± 128.9 (0–700) 0.46 ± 1.89 (0–9) 0.136 
Pseudomonas aeruginosa 1.2 ± 5.2 (0–30) 1.7 ± 7.5 (0–50) 0.231 
Clostridium perfringens 1.54 ± 9.92 (0–70) 0.303 
22 °C CFU 30.7 ± 96.74 (0–600) 28.0 ± 86.6 (0–400) 42.4 ± 158.9 (0–1,000) 0.811 
37 °C CFU 40.3 ± 154.5 (0–1,000) 26.2 ± 104.5 (0–500) 52.7 ± 167.4 (0–1,000) 0.659 
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