Parameters

Unit

Min

Max

Mean

Std. error

Skewness

Kurtosis

WHO Guideline 2011

Physico-chemical

pH

-

7.0

7.3

7.135

0.023

0.224

−0.541

6.5 - 8.5

Turbidity

NTU

0.09

0.38

0.216

0.020

0.480

−0.342

<5

Salinity

‰

0.14

0.36

0.232

0.014

0.547

0.277

1.2

Total Dissolved Solids (TDS)

mg/L

287

415

355.059

9.353

−0.298

−0.997

<1000

Chloride

98.5

140

113.835

2.725

0.658

0.123

<250

Hardness

114

169

135.353

4.086

0.460

−0.794

<500

Sulphate ( ${\text{SO}}_4^{-}$ )

77.8

142

109.065

5.537

0.255

−1.337

250

Nitrate ( ${\text{NO}}_3^{-}$ )

0.07

0.44

0.188

0.024

1.358

1.565

12

Phosphate ( ${\text{PO}}_4^{-}$ )

0.56

1.63

1.084

0.069

0.056

−0.187

3

Metals

Arsenic (As)

mg/L

BDL

0.074

0.039*

0.006

0.010

−0.931

0.01

Copper (Cu)

0.32

0.91

0.608*

0.045

0.210

−1.212

0.2

Lead (Pb)

0.18

0.96

0.554*

0.057

0.124

−1.008

<0.01

Iron (Fe)

0.24

1.88

1.080*

0.152

0.170

−1.792

0.3

Zinc (Zn)

0.55

1.88

1.352*

0.117

−0.328

−1.616

0.5

Calcium (Ca)

25.43

35.71

30.869

0.723

−0.025

−0.957

150

Magnesium (Mg)

6.18

8.67

7.496

0.175

−0.021

−0.956

100

Manganese (Mn)

2.11

3.85

3.079*

0.125

−0.227

−0.973

<0.5

Fluoride (Fl)

0.028

0.091

0.064

0.004

−0.383

−0.548

1.5

Molybdenum (Mo)

0.11

0.26

0.171*

0.011

0.376

−0.448

0.01

Microbial

Total Coliform Count (TCC)

MPN/100mL

<3

460

172.353*

35.338

0.540

−0.026

0

Total Faecal Coliform (TFC)

<3

240

77.765*

18.716

0.743

−0.436

0

Total Faecal Streptococci (TFS)

<3

9

4.882*

0.600

0.828

−1.128

0