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Table 3 Regional variation in the values of chemical parameters of drinking water

From: Water Quality Index for measuring drinking water quality in rural Bangladesh: a cross-sectional study

  Chemical parameter
Sample site pH Manganese (Mn) (mg/L) Iron (Fe) (mg/L) Salinity (NaCl) (mg/L) Arsenic (As) (mg/L)
Alfadanga (Faridpur) Median 7.4 0.3 0.6 400 0.033
IQR 0.3 0.4 2.5 150 0.063
Mean ± SD 7.4 ± 0.4 0.3 ± 0.2 2.0 ± 2.9 478.6 ± 210.0 0.047 ± 0.034
Kendua (Netrokona) Median 7.4 0.2 0.5 200 0.007
IQR 0.4 0.4 1.4 100 0.01
Mean ± SD 7.6 ± 0.4 0.3 ± 0.3 1.1 ± 1.7 197.0 ± 243.0 0.031 ± 0.053
Shibchar Median 7.4 0.9 2 450 0.045
IQR 0.4 0.9 3.9 500 0.028
Mean ± SD 7.4 ± 0.3 0.9 ± 0.6 2.0 ± 2.8 584.4 ± 352.1 0.057 ± 0.037
Rupsha (Khulna) Median 7.4 0.2 1.4 1050 0.008
IQR 0.3 0.1 2.4 1050 0.013
Mean ± SD 7.4 ± 0.2 0.2 ± 0.1 2.3 ± 2.0 1180 ± 723.0 0.009 ± 0.006
Debhata (Satkhira) Median 7.4 0.2 0.8 400 0.003
IQR 0.2 0.2 0.5 150 0.001
Mean ± SD 7.5 ± 0.4 0.3 ± 0.3 1.4 ± 1.6 391.7 ± 79.3 0.006 ± 0.006
Patharghata (Barguna) Median 7.4 0.2 0.6 100 0.004
IQR 0.4 0.2 0.4 400 0.000
Mean ± SD 7.4 ± 0.3 0.2 ± 0.1 0.9 ± 0.7 717.5 ± 1133.2 0.004
Rangabali (Patuakhali) Median 7.4 0.1 0.4 500 0.005
IQR 0.2 0.1 0.2 100 0.002
Mean ± SD 7.5 ± 0.3 0.1 ± 0.1 0.4 ± 0.3 557.5 ± 84.4 0.004 ± 0.001
Anwara (Chittagong) Median - 0.2 2.0 - 0.006
IQR - 1.5 3.2 - 0.008
Mean ± SD - 0.7 ± 0.8 2.8 ± 3.2 - 0.009 ± 0.008
Bijoynagar (B.Baria) Median 7.3 0.1 0.3 100 -
IQR 0.0 0.2 0.9 0 -
Mean ± SD - 0.3 ± 0.4 0.6 ± 0.8 - -
Shajahanpur (Bogra) Median 7.4 0.3 0.7 100 -
IQR 0.5 0.4 0.9 0 -
Mean ± SD 7.4 ± 0.3 0.4 ± 0.4 1.2 ± 1.4 - -
Kamlganj (Moulvibazar) Median - 0.3 2.3 - 0.075
IQR - 0.5 6.2 - 0.000
Mean ± SD - 0.4 ± 0.3 5.0 ± 6.2 - -
Sadar (Kurigram) Median 7.4 - - 100 -
IQR 0.5 - - 100 -
Mean ± SD 7.5 ± 0.4 - - 135.0 ± 62.2 -
Bangladesh standard 6.5-8.5 0.1 0.3-1.0 150-600 0.05
WHO standard 6.5-8.5 0.4 0.3 250 0.01
  1. Water pH in shallow tubewell: median (7.4), IQR (0.5), mean (7.5), SD (0.38). Water pH in deep tubewell: median (7.4), IQR (0.4), mean (7.4), SD (0.32)