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Table 1

Physico-chemical parameters of the samples

ParametersBottled water mean ± SD (min–max)Tap water mean ± SD (min–max)Filtered water mean ± SD (min–max)p
Conductivity 159.41 ± 81.03 (37.40–490.30) 576.12 ± 73.81 (436.0–880.0) 108.13 ± 144.34 (3.0–583.0) 0.000 
pH 7.68 ± 0.37 (6.95–8.25) 7.47 ± 0.13 (7.14–7.88) 6.54 ± 0.52 (5.57–8.26) 0.000 
Aluminum (Al) Not tested 0.29 ± 2.06 (0–14.60)  
Fluoride (F) 0.04 ± 0.05 (0–0.29) 0.19 ± 0.2 (0–0.87) 0.04 ± 0.05 (0–0.16) 0.000 
Chloride (Cl) 4.08 ± 4.33 (0–22.80) 11.55 ± 4.95 (4.95–55.67) 2.03 ± 2.58 (0–12.45) 0.000 
Nitrate (NO33.13 ± 3.52 (0.20–16.43) 15.84 ± 5.44 (5.56–32.20) 5.31 ± 6.17 (0–38.93) 0.000 
Nitrite (NO2Not detected Not detected Not detected  
Bromate (HBRO32.28 ± 3.15 (0–15.27) Not tested Not tested  
Arsenic 0.33 ± 0.39 (0–1.18) Not tested Not tested  
Ammonium (NH4<0.04 Not tested Not tested  
ParametersBottled water mean ± SD (min–max)Tap water mean ± SD (min–max)Filtered water mean ± SD (min–max)p
Conductivity 159.41 ± 81.03 (37.40–490.30) 576.12 ± 73.81 (436.0–880.0) 108.13 ± 144.34 (3.0–583.0) 0.000 
pH 7.68 ± 0.37 (6.95–8.25) 7.47 ± 0.13 (7.14–7.88) 6.54 ± 0.52 (5.57–8.26) 0.000 
Aluminum (Al) Not tested 0.29 ± 2.06 (0–14.60)  
Fluoride (F) 0.04 ± 0.05 (0–0.29) 0.19 ± 0.2 (0–0.87) 0.04 ± 0.05 (0–0.16) 0.000 
Chloride (Cl) 4.08 ± 4.33 (0–22.80) 11.55 ± 4.95 (4.95–55.67) 2.03 ± 2.58 (0–12.45) 0.000 
Nitrate (NO33.13 ± 3.52 (0.20–16.43) 15.84 ± 5.44 (5.56–32.20) 5.31 ± 6.17 (0–38.93) 0.000 
Nitrite (NO2Not detected Not detected Not detected  
Bromate (HBRO32.28 ± 3.15 (0–15.27) Not tested Not tested  
Arsenic 0.33 ± 0.39 (0–1.18) Not tested Not tested  
Ammonium (NH4<0.04 Not tested Not tested  
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