Pb (mg/l)

Cd (mg/l)

Zn (mg/l)

Cu (mg/l)

Ni (mg/l)

Co (mg/l)

pH

EC

TDS (ppm)

Temp (˚C)

NIS STANDARD (2007)

0.01

0.003

3.0

1.0

0.02

-

6.5 - 8.5

1000

500

Ambient

WHO STANDARD (2012)

0.01

0.003

3.0

2.0

0.07

-

6.5 - 9.2

500

500

-

EKW1

0.800

0.235

0.265

2.845

0.620

<0.001

8.1

243

122

25.2

EKW2

1.550

0.165

0.170

0.050

0.345

15.225

9.2

483

242

27.0

EKW3

<0.001

0.080

0.820

<0.001

<0.001

<0.001

8.9

393

196

26.6

EKW4

0.300

0.190

0.325

<0.001

0.015

<0.001

9.5

248

125

32.0

EKW5

0.050

0.085

2.355

0.200

<0.001

<0.001

8.0

152

300

31.0

EKW6

0.200

0.130

0.585

0.010

<0.001

<0.001

9.3

329

163

28.8

EKW7

0.350

0.160

0.635

0.135

0.230

<0.001

8.9

325

162

28.6.

IGW1

<0.001

0.055

0.870

0.010

<0.001

<0.001

9.3

134

230

31.0

IGW2

<0.001

0.045

0.655

<0.001

0.170

<0.001

8.4

358

179

27.9

IGW3

0.150

0.015

<0.001

<0.001

<0.001

<0.001

9.4

583

289

27.9

MEAN

0.485714

0.116

0.742222

0.541667

0.276

15.225

8.9

320.3

200.8

28.6

STANDARD DEVIATION

0.527347

0.071016

0.651585

1.130888

0.226147

0.549747

134.9502

62.85574

2.165897

VARIANCE

0.278095

0.005043

0.424563

1.278907

0.051143

0.302222

18211.57

3950.844

4.691111