Skip to main content

Table 4 Pearson correlation matrix among metals in the groundwater samples

From: Evaluation of water quality and human risk assessment due to heavy metals in groundwater around Muledane area of Vhembe District, Limpopo Province, South Africa

Variables

Cr

Cu

Fe

Mn

Pb

Zn

Cd

January

 Cr

1

0.069

0.371

0.070

0.256

0.199

0.169

 Cu

0.069

1

0.734

− 0.633

− 0.444

0.099

0.307

 Fe

0.371

0.734

1

− 0.041

− 0.231

− 0.064

0.272

 Mn

0.070

− 0.633

− 0.041

1

0.070

− 0.265

− 0.241

 Pb

0.256

− 0.444

− 0.231

0.070

1

− 0.066

0.107

 Zn

0.199

0.099

− 0.064

− 0.265

− 0.066

1

0.779

 Cd

0.169

0.307

0.272

− 0.241

0.107

0.779

1

April

 Cr

1

− 0.267

− 0.359

− 0.336

0.971

0.312

− 0.169

 Cu

− 0.267

1

0.576

0.710

− 0.245

− 0.124

− 0.142

 Fe

− 0.359

0.576

1

0.823

− 0.386

0.136

− 0.559

 Mn

− 0.336

0.710

0.823

1

− 0.397

− 0.118

− 0.500

 Pb

0.971

− 0.245

− 0.386

− 0.397

1

0.351

− 0.081

 Zn

0.312

− 0.124

0.136

− 0.118

0.351

1

− 0.712

 Cd

− 0.169

− 0.142

− 0.559

− 0.500

− 0.081

− 0.712

1

June

 Cr

1

0.168

0.019

0.070

0.717

0.125

− 0.386

 Cu

0.168

1

− 0.327

− 0.381

− 0.199

− 0.263

− 0.287

 Fe

0.019

− 0.327

1

0.995

− 0.063

0.662

0.398

 Mn

0.070

− 0.381

0.995

1

0.010

0.663

0.379

 Pb

0.717

− 0.199

− 0.063

0.010

1

0.139

− 0.026

 Zn

0.125

− 0.263

0.662

0.663

0.139

1

0.738

 Cd

− 0.386

− 0.287

0.398

0.379

− 0.026

0.738

1

  1. Values in italic have significance correlation